[[AwesomeMusic/{{Supernatural}} Awesome Music]] and [[HoYay/{{Supernatural}} Ho Yay]] have their own pages.

* AcceptableTargets:
** From Crowley's EvenEvilHasStandards rant to Crossroads Demon who had been breaking deals:
-->"This isn't Wall Street, this is Hell! We have a little something called [[TakeThat integrity!]]"
** According to one demon, Dick Cheney has his own personal room reserved in Hell.
** Sarah Palin becoming president is considered a sign of the Apocalypse.
* AlasPoorScrappy: [[spoiler: Bela and Jo]] were ''hated'' for the majority of their run, the former for [[spoiler:being a selfish, treacherous SmugSnake who made making the boys look like idiots her hobby without much come-uppance]], the latter character because [[spoiler:fans thought she was an immature, somewhat moronic FlatCharacter who didn't deserve to be Dean's LoveInterest]]. Fans ''begged'' the writers to give the characters the boot--preferably with a nasty death scene. Well, the death scenes came--[[spoiler:Bela was revealed to be a sexual abuse victim and got ripped up by hellhounds and dragged off to {{Hell}} for eternity, while Jo got a heap of CharacterDevelopment that established her as a matured and pragmatic hunter, risked (and lost) her life to save Dean, and then performed a tragic HeroicSacrifice]]--[[BeCarefulWhatYouWishFor much to the fans' horror]]. Since then, there have been campaigns to get the characters back, they are better-embraced in the fandom in general (saying that you like them won't get you open-mouthed stares or bewildered questions anymore, at any rate), and even those who still don't really ''like'' the characters will admit that they got pretty sad [[ADeathInTheLimelight send-offs]].
* AlternativeCharacterInterpretation: The show thrives on this so much that sometimes it comes back to bite them in the ass.
** Sam can be either saintly or smug. Sam was either jealous of Gordon taking his brother/father/mother figure away from him, or genuinely concerned about Dean latching onto a replacement Daddy figure.
** Dean's martyrdom is portrayed as either saintly or as something unhealthy and damaging. Dean's sluttiness can jump between funny and harmless or compulsive and slightly sad, or he's either a charming playboy or a womanizer. Dean's attitude regarding Sam can be seen as someone who selflessly looks after his brother no matter what or is alternatively very selfish, controlling, and self-righteous. And because of that, depending on how you look at it Sam could either often times be an UngratefulBastard or [[StrawmanHasAPoint justifiably defiant]] when it comes to ignoring his brother's wishes.
** John Winchester comes off as either a man who is willing to sacrifice everything ([[spoiler:including himself]]) for his family, or a callous bastard who emotionally abused his children in the pursuit of revenge.
** It remains unclear whether Ruby truly cared about Sam or if she was just using him [[spoiler:to raise Lucifer]].
** Was Anna [[spoiler:following Heaven's orders]] or not in "The Song Remains the Same"? There's just as much evidence to support one as the other. InUniverse, she even argues about which one it is with Cass. Moreover, was she [[spoiler:the villain of the episode trying to murder the Winchesters even after they helped save her, a very dark, very desperate Anti-hero / Anti-villain using evil methods to prevent a worse outcome, or a Hero Antagonist trying to undo the Apocalypse by making it so the heroes never existed]]?
** In "Time After Time", was [[spoiler:Chronos an unrepentant monster who killed only to fuel his own powers, or was he genuinely tired of millennia of involuntary "Quantum-Leaping" through time and honestly believed his victims were necessary sacrifices so he could remain tethered to 1944 and be with the woman he loved?]]
** Castiel: Is he a naive, socially awkward but well-meaning angel who selflessly devotes himself to his friends and gets abused and taken advantage of? Or is he an amoral, calculating, borderline sociopath on a power trip who gets off on controlling and manipulating everyone around him? At the end of Season 6 did [[spoiler: he betray the Winchesters, or did they betray him? Or both?]] Was he really trying to save the world, or [[spoiler: was he just Drunk With Power by that point]]? There was some, ahem, heated discussion about this following the Season 6 finale.
** In "Sacrifice", was Jane really the only Nephilim in existence or was Metatron simply lying to Castiel in order to get him to kill "[[FantasticRacism an abomination]]" as he saw it? [[spoiler: Considering that he repeatedly lies to Castiel about what they are doing, this throws the rest of his claims into doubt as well?]].
* AnticlimaxBoss: An annoying trend in the series. Each season BigBad, no matter how powerful they are hyped to be, typically ends up dead due to being stabbed/shot by the anti-whatever-creature-they-are PlotDevice in a fight lasting about 30 seconds.
* {{Anvilicious}}:
** Processed food makes you fat and stupid. Also, the food industry is run by monsters who don't see you as much more than cattle to be exploited. Considering how much Sam and especially [[BigEater Dean]] enjoyed processed food and food in general in Seasons 1 - 6, it seems to be less Anvilicious and more just a smart plan by Dick Roman... everyone has to eat after all. As for companies being treated that way, it seems to be less the companies than the eternally hungry Leviathans possessing/pretending to be those in the companies.
** In keeping with the political tone of S7's second half, Charlie ended up being a rather unsubtle mouthpiece for the writers' political beliefs. She's seen hacking into a political website and stealing millions of dollars of other people's campaign contributions and then funneling their donations away to causes that she would prefer to support, which is obviously illegal and wrong, but she's presented as being a wonderful and heroic person for doing it because the campaign she steals from is conservative and therefore obviously "evil".
* BadassDecay:
** Ruby is a [[DeadpanSnarker snarky]], fearless ActionGirl in Season 3. In the next season, she... isn't. This is at least partially due to Genevieve Cortese wanting Ruby to seem vulnerable and innocent and so she plays her differently than Katie Cassidy does, but the writing itself for Ruby provides for less {{Badass}}ery in Season 4.
** In Season 5, Castiel's power is nerfed and he begins to be used for more comical scenes after [[spoiler:being cut off from Heaven]]; since he's a regular character now, [[DeusExitMachina he's not allowed to become too powerful.]] Completely reversed in the following seasons when [[spoiler:his angelic powers are fully restored]].
** Angels in general were described as the most unbelievably powerful entities besides God during Seasons 4 through 6, and everyone in-universe reacted with awe at them... until the Leviathans showed up and were described as being scary even to the angels. That said...
** The Leviathans. They went from being an ancient evil that was sealed away by God for being ''too'' dangerous to unleash upon the world... to suddenly being taken out by normal humans and demons, [[CurbStompBattle left, right and centre]]. Then again, out of all the Leviathans, the heroes managed to kill a grand total of one in the whole season.
** Crowley's character arc has taken a few weird turns over the seasons. He started out in season 5 as a DangerouslyGenreSavvy snarker who [[EnemyMine allied with the Winchesters solely for his own benefit]]. Then when their interests no longer coincided in season 8, he became a lot more evil, routinely [[KickTheDog kicking the dog]] and capping it off with [[spoiler:arranging to kill ''everyone'' the Winchesters have ever saved]]. In season 9, he got nerfed due to the aborted demon cure trial the boys performed on him and spent most of it chained up in a cellar. He eventually gets reduced to a human blood-addicted mess who cries at romantic movies while he was supposed to be looking for a special weapon to kill Abaddon, the [[MakeWayForTheNewVillains new demonic threat on the block]]. The Winchesters openly express their disgust at [[HowTheMightyHaveFallen how inconsequential the supposed King of Hell has become]].
* BaseBreaker:
** [[RichBitch Bela]]. Hated for most of her short tenure on the show, she started getting viewed with more sympathy in "Time is on My Side" after [[spoiler:she got ripped apart by hellhounds]], and became the subject of a petition to be brought back to the show.
** Sam, starting with [[JumpingOffTheSlipperySlope his behavior]] and [[KickTheMoralityPet treatment of Dean]] in Season 4. Although he tried to make amends in Season 5, [[NeverMyFault his continuing to lay some of the blame at Dean's feet]] grated some fans the wrong way, and his being the center of many of the more interesting story-lines in comparison to his brother only made it worse. Season 8 saw him become even more divisive with his ItsAllAboutMe attitude, which show-runners view as positive CharacterDevelopment and the majority of the fan-base viewed as incredibly selfish and self-righteous.
*** The blame game may have been pretty arrogant, but Sam had something of a point. Dean's only reason for not ''helping'' Sam was because the "demon bitch" was a dealbreaker. ignoring how Ruby had saved them countless times. Dean provoked the fight simply because he refused to reign in his phobia, and Sam was clearly being affected mentally by the demon blood. Calling him a monster was not a smart choice.
**** There was a bit more to it than that. Dean found out that said "demon bitch" was getting Sam to drink demon blood, and if the fact that it's demon blood isn't enough to indicate that ingesting it is a horrible idea, there's also the fact that the stuff gives him clearly unnatural powers, apparently alters his mood and cognitive capability, and is highly addictive to the point Sam goes through withdrawals without it and requires a detox in Bobby's demon-proofed basement each time he's trying to get off it. She was also egging Sam on in what was clearly becoming a dangerous and downright obsessive vendetta against Lillith, whom it was stated Ruby had dealings with in the past. Not to mention that by this point, Dean had spent what amounted to forty years in HELL, giving him a very clear inside view of the process that turns humans into demons. He had a number of things to base his judgement on, and while he certainly didn't handle it the best way, it turned out he was right not to trust her.
*** Sam has also struggled in this regard due to the NonPOVProtagonist issues. Not that Sam never gets perspective, and he does do legitimately dickish things on occasion. However, he tends to have a lot more plot revolving around him, and we tend to see a lot of more of Dean's mindset/emotions. Thus, when the brothers disagree, it tends to be a lot easier to understand Dean's perspective than Sam's, and therefore conclude that [[ProtagonistCentredMorality if Sam is going against Dean, he's "wrong."]] It doesn't help that since Dean's both a KnightTemplarBigBrother and a ParentalSubstitute whose life largely revolves around Sam, anytime Sam disagrees with him or does something hurtful he looks like an UngratefulBastard. Taken to extremes by [[VocalMinority some fans]] who cite Sam as selfish for "sins" such as going to college or, uh, [[spoiler:''dying'' in Season 9]] because Dean was against those things.
** The {{Anvilicious}}ly {{Adorkable}} Charlie Bradbury.
** Ruby. There are fans who like the character and think she's a good ally and genuinely on the boys' side, those who are suspicious of her motives but think she's interesting, and other fans who flat-out hate her. After TheReveal, fans are divided between those who still hate her, those who think the character got screwed over because fan-hate changed her original direction, and those who [[spoiler:actually love her for being a devious villain]]. ''Then'' camps are split between who prefers Ruby 1.0 and who prefers Ruby 2.0, since Katie Cassidy and Genevieve Cortese play the character in two totally different ways.
** John Winchester: Bastard!Daddy or Daddy Of The Year?
** Castiel, by Season 9, and the rest of the angels by extension. Still relevant to the series or shameless pandering?
* BizarroEpisode: "The Spirit of Las Vegas" has screwier and more {{Animesque}} humor than other episodes. Fitting, as the MonsterOfTheWeek is Japanese.
** Season 9 included a PoorlyDisguisedPilot for a spinoff that wasn't picked up, meaning Chicago being secretly run by demons will likely just become a weird little thing on the fringes of the show's canon.
* BrokenBase:
** The Psychology Club vs. Action, Monsters, and Rock Salt vs. The Hardy Boys with Hotties.
** Sam!Girls vs. Dean!Girls vs. Bi!Bro. Castiel!girls are now starting to get into the mix as well.
** In addition to arguing over who's the best/hottest character, there also are fans, at any given time, arguing over who the show shoves into the background and who takes up all the spotlight: Sam[[note]]who, admittedly, was objectively a lot more important to the story for the first two seasons[[/note]], Dean, or Castiel?
** Monsters Of The Week vs. The Destiny/Self-Worth Arcs.
** Seasons 1-3 vs. Seasons 4 & 5 vs. Seasons 6-8. There's also now a third faction of Season 1-3 and 4-5 supporters who have made peace with ''each other'', but teamed up against Seasons 6-8.
** More broadly fought are the Showrunner Wars: Eric Kripke vs. Sera Gamble. With Jeremy Carver stepping up as the new showrunner, its bound to only get worse.
** Dean/Castiel vs. Wincest.
** "Yay, guest stars!" vs. "Kill everyone who isn't Sam'n'Dean and make it especially brutal if they could possibly become a LoveInterest."
** Following "Everybody Hates Hitler," Canon Bi/Gay!Dean vs. Canon Straight!Dean
** The whole Sam v. Dean business in general. Due to their OddCouple personalities, many fans are going to identify with one brother more than the other, but anytime they fight, it turns into one brother being a put-upon selfless martyr who is continually victimized by the other brother's heartless treatment.
*** The Season 9 conflict: [[spoiler: Did Dean essentially rape Sam by forcing a possession onto him without his consent, and Sam can't ever trust him again? Or did Dean selflessly and lovingly do what he had to do to save Sam's life, and should now disown Sam for his far worse and more abusive retaliatory speeches? Or, are you in the middle, think both brothers have a case right now, but that they're both acting like teenagers?]]
** After the BackdoorPilot for the spin-off "Supernatural: Bloodlines" aired, there's a division between those who think it has potential and interresting characters and those who think it's full of clichés, has ''another'' StuffedInTheFridge set-up, and shatters the show's canon (having shapeshifters who magically shapeshifts and live in a lavish house instead of peeling off their skin and living in sewers.) Though it's a bit of a moot point after the poor reception got the show dropped. It also helps that the season was an episode longer than normal, meaning we technically didn't lose an episode for it.
** Jensen and Jared ticked a lot of people off with their statements at a con that not only was Dean/Cas never going to happen, but it would "ruin the show." Many fans took umbrage to the implication that a homosexual relationship would wreck the whole series, and quit watching, accusing the show of deliberate queerbaiting for years with no intention of ever following through.
* CanonSue: Charlie Bradbury. Even the main season 7 villain thinks she's awesome and she warps Sam and Dean's personalities every time she appears. She turns all of her episodes into the Charlie show and if there is a female character in any of her episodes they will inexplicably be a lesbian.
* CompleteMonster: Many villains come very close to this trope. After all, they are, for the most part, monsters, and that's what they do. As a result, it takes a special kind of evil to actually qualify. Fortunately (or unfortunately, as the case may be), several of the {{Big Bad}}s and their flunkies are able to provide just that kind of evil. Here are the assorted bastards:
** Alistair is Hell's [[TortureTechnician Grand Inquisitor]], and is responsible for supervising the [[ColdBloodedTorture torture]] of newly arrived souls. When Dean arrives in Hell, Alistair tortures him for thirty years, offering to stop if Dean will [[DealWithTheDevil accept his offer]] and torment other souls on Alistair's behalf. When Dean accepts, one of the seals imprisoning [[BigBad Lucifer]] is broken, a fact that Alistair frequently taunts Dean about during their subsequent encounters. During the hunt for Anna Milton, Alistair captures Ruby and begins cutting pieces away from her with her own knife, before trying to overpower and murder Castiel. He murders several Reapers later in the series, and does his best to kill Sam and Dean and banish Castiel, before being finally put out of commish. An utterly sadistic [[TheBully bully]], Alistair is rivaled only by [[TheDragon Lilith]] when it comes to being the worst demon in the series.
** Lilith, the queen bitch of all ''Supernatural'', is the oldest demon in existence, and easily the worst. She massacres a police station, killing everyone that Sam and Dean had just finished saving, uses her position as the holder of [[{{Jerkass}} Bela]]'s [[DealWithTheDevil contract]] to try and force her to kill Sam, and keeps a personal chef on hand to prepare [[EatsBabies human infants]] for her to eat. She's also got a thing for [[DemonicPossession possessing]] [[EnfanteTerrible little girls]], destroying their families from the inside out for her own personal amusement. In the season three finale, she holds a family hostage (killing the grandfather for making her mad), and has Dean dragged off to Hell, laughing the entire time. Reappearing in Season 4, Lilith reveals that her current plan is to free [[{{Satan}} Lucifer]], bringing about TheEndOfTheWorldAsWeKnowIt. When she discovers that freeing Lucifer will ensure her death, she tries to back out, offering to put off the apocalypse if Sam and Dean will let her kill them. Defeated by Sam in the Season 4 finale, [[spoiler: Lilith [[SuicideByCop goads him into finishing her]], knowing that her death will result in the [[KillAllHumans deaths of all humanity]]]].
** The leader of the [[EldritchAbomination Leviathans]], commonly known by assumed name Dick Roman, wasted no time in establishing himself as one of the worst Supernatural's ever had to offer. Not content with simply lurking in the shadows to feed on humanity, Roman planted his minions in key positions, murdering and devouring every human in the way. Taking control of a major company, Roman began to place chemicals in corn syrup so humanity would be rendered helpless as cattle for the Leviathans to feed on. The Winchesters, who he knew could prove an issue, he framed for a nation-wide killing spree. Other monster species were seen as 'competition,' with Roman planning to exterminate them as well after manipulating them into helping him. A BadBoss even by the show's standards, Roman was known to devour his minions in a fit of rage or 'bib' them: forcing them to devour themselves. Few villains on ''Supernatural'' have managed to inspire the same fear or hatred as Roman did, and his [[spoiler: killing of Bobby Singer only deepened the hatred the Winchester brothers had for him]].
** Abaddon was one of the [[DemonLordsAndArchdevils Knights of Hell]], demons handpicked by Lucifer to be his strongest and most evil enforcers. She was trained by [[BiblicalBadGuy Cain]], the original Knight, but when he fell in love with the human Colette he grew tired of his evil ways and [[TheAtoner atoned for his crimes]]. Abaddon tricked Cain into murdering Colette with the First Blade to spite him for [[{{Yandere}} choosing a human over her]], earning his undying hatred. After millennia of rampaging across the Earth under Hell's banner, she kills a priest in 1958 who was investigating a demon cure before possessing Josie Sands instead of her companion Henry Winchester to infiltrate the [[CreatureHunterOrganization Men of Letters]]. Abaddon notes how Josie is secretly in love with Henry and takes her as a vessel solely to hurt them both. She wipes out the Men of Letters completely in a massacre before traveling into the future where she kills Henry anyway after [[ILied going back on a deal she made]] with Sam and Dean. After learning that Hell has been brought under the command of the more pragmatic Crowley in her absence, she sets out to remove him from his position to become Queen of Hell and start a new blood-filled reign of terror on Earth, with torture, murder, and baby-eating in abundance for all her minions. After Crowley regains his human emotions, she kidnaps his son Gavin from 1723 and proceeds to torture him in front of his father. He caves in to her demands and helps her to defeat the Winchesters, but then she decides to kill both Crowley and Gavin anyway.
* CreatorsPet:
** Ruby, at first. Fan-reaction to her was very negative at first, but Kripke believed that with enough time and characterization, fans would like her. Towards the end of Season 3, it seemed to be working, but the final reaction was... mixed.
** Charlie Bradbury. While fan reaction is very mixed, she's considered a Scrappy to many, but she definitely qualifies by her second appearance. If being an over-the-top {{adorkable}} genius hacker (that even BigBad Dick Roman [[CharacterShilling thinks is amazing and special]]) who just happens to be a lesbian wasn't enough, she returns in a later episode, where she's introduced beating a LARP-knight in a swordfight and gets talked up by more and more characters. And in her next episode, she suddenly has ImprobableAimingSkills, a BelatedBackstory, and is an AscendedFangirl. Additionally, she's an AuthorAvatar for [[http://missyjack.livejournal.com/954514.html writer Robbie Thompson]].
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* CreepyAwesome: [[MemeticMolester Azazel]], [[TortureTechnician Alastair]], [[TheGrimReaper Death]], and [[DarkActionGirl Abaddon]] have been big hits with fans, either because or in spite of the fact that they're all incredibly unsettling on-screen. Although most of those listed are evil, though, Death manages to be both CreepyAwesome and largely benevolent... [[LawfulNeutral or at least he helps the Winchesters from time to time]].
* CultClassic: Definitely big, but only within a select number of people. Lampshaded by Sam in "The French Mistake."
* DarknessInducedAudienceApathy: Can sometimes fall victim to this, especially in later seasons. Virtually every character who isn't Sam, Dean or Castiel inevitably winds up dying horribly, the "heroes" often behave in ways that are just as morally reprehensible as the villains, the main characters' obvious mental health issues are never fully addressed or resolved and the brothers seem to be locked in a permanent cycle of lying to and keeping secrets from each other, all of which has lead many viewers to wonder why they should bother caring.
* DieForOurShip: Any female that gets near the boys is vilified by the show's {{Yaoi Fangirl}}s. Although Ellen and Pamela were typically very popular with female fans. One might wonder if many of the fangirls' chief problem was that most of the love interests were little more than {{Token Romance}}s and were given few defining characteristics of their own. This is demonstrated by the sudden turnaround in attitudes to Ellen's daughter Jo, who was practically a CreatorsPet during her early appearances in Season 2, but after some serious displays of {{Badass}}, seemingly defying physics by turning down a night with Dean, and then [[spoiler:performing a HeroicSacrifice]] in Season 5, [[RescuedFromTheScrappyHeap became a much more popular and relatable character to female fans]]. (Though there are quite a few people who ''did'' like Jo from the start and did believe she had a lot of character in her early appearances, not to CreatorsPet levels. The sudden turnaround may not be because they saw she had more character, but because [[spoiler:[[AlasPoorScrappy she ''dies'']]]] in the very same episode this happens in.)
** The fans seem to be easing up a little though, because the fanbase started to embrace Lisa the more episodes she appeared in. Might have something to do with the fact that she's presented as a three-dimensional character that's fairly sensible and supports Dean being a hunter. Also, people found her easier to relate to when [[spoiler:she told Dean off and broke up with him after he shoved Ben]].
** And the tradition continued with [[DarkActionGirl Meg]], after she [[spoiler:took Castiel's first kiss]] in "Caged Heat". [[spoiler:And he ''responded'']]. It caused a fandom uproar from supporters of other ships.
* DracoInLeatherPants:
** Many fans still believe [[spoiler:Ruby actually loved Sam]]. It is implied that she did, in some twisted way, hope that they could rule under Lucifer together. Doesn't make her any less evil, though.
** The fanbase tends to focus on the Trickster's humorous qualities and HeelFaceTurn, ignoring the enormous body count that his "jokes" leave behind him. This may be because he killed a grand total of two people on-screen--but remember that he was on Earth as the Trickster and viciously killing/traumatizing [[AssholeVictim people he thought deserved to be taught a lesson]] for ''millenia''. The Trickster turned out to be decent enough to try to stop [[{{Satan}} his brother]], but at best he was a [[DisproportionateRetribution seriously sadistic]] KnightTemplar.
** Lucifer gets this from quite a few fans, especially after the "Hallucifer" episodes that portrayed him as much funnier than he was initially; fans tend to forget that what was portrayed there was not his actual personality. His "humor", [[TheWoobie woobie]] and [[TheUnfavorite unfavorite]] roles that compare him to Sam, and the idea that God and heaven are all jerks are all played up in these interpretations of him, while ignoring or downplaying the terrible things he did.
* DryDocking: With the fans who aren't Wincesters (or, now, Destiel shippers). This is why Jo had such a backlash in Season 2 and had to be written out.
* EnsembleDarkhorse:
** [[Recap/SupernaturalS01E19Provenance Sarah Blake]]. Seven years after her one appearance, she's still a FanPreferredPairing for Sam (when not pairing him up with [[YaoiFangirls other males]], at least).
*** On the other hand, [[spoiler: she's now dead at Crowley's hands, so...]]
** Bobby. Even the actor expected him to have a small role, but he was deeply integrated into the show after his original appearance, basically becoming the third lead behind the boys. [[spoiler:When he finally departed for good, you cannot help but feel that the writers have done ''everything'' with the character that was needed, and are satisfied with the conclusion to his story despite it being a TearJerker.]] Very few characters ''anywhere'' got as much of a privilege as him.
** On the villains' side of things, there's YED/Azazel. You know you've got yourself a popular villain when the reaction of a fanbase to his sudden reappearance isn't [[BigNo "No!"]] but [[BigYes "YEEES!"]] No [[DracoInLeatherPants leather pants]] involved here: he's beloved precisely because of how [[MagnificentBastard marvellously evil]] he is while still being a sadistic, [[MemeticMolester pervy]] DeadpanSnarker.
** The fanbase may not take kindly to most recurring female characters, but it unanimously embraced Ellen; at one point, it was actually more common to pair ''her'' up with Dean (or Sam) than with Dean's ''intended'' LoveInterest, Ellen's daughter Jo. To a lesser extent, there's Ellen's fellow moms Jody Mills and Linda Tran.
** [[KnightTemplar Gordon]] [[HeWhoFightsMonsters Walker]].
** Agent Henriksen. TelevisionWithoutPity bestowed upon him the nickname "Agent Scooter [[InspectorJavert Javert]] [[{{Badass}} Badassitude]]", [[MemeticBadass and it actually suits him]].
** Gabriel has both a large number of fans (he even has his own Big Bang on Livejournal) and a lot of people who want to see him again [[spoiler:even after he was KilledOffForReal by his brother]].
** Castiel was only supposed to appear in six episodes in Season 4 before getting killed off, but [[SavedByTheFans he made such a good impression on the fans that the show made him a regular for Season 5]]. The fact that he's extremely attractive probably doesn't do his popularity any harm, either. Ironically, he's so prominent that people outside of the fandom can recognize him but not the Winchesters, the show's actual stars. In fact, new fans are always surprised when they first watch the series and find that not only does Castiel not come in until Season 4, but he doesn't even appear in half the episodes.
** Crowley manages to be [[LaughablyEvil hilarious]], [[WickedCultured classy]], and simply [[MagnificentBastard magnificent]]. He's also played by MarkSheppard.
** [[TheGrimReaper Death]]. His BigEntrance set to [[AwesomeMusic "O Death" by Jen Titus]] started it. Part of his badass credentials is that he's one of the very few supernatural entities that Dean actually respects. Dean being the guy that verbally abused an entire room full of gods multiple times as a way to offer his help, while unarmed and with no exit route. Death's on a completely different level from literally anything the boys have faced. He could solve just about any problem they had, it's just that he literally doesn't care any more than a biologist would care about the emotional state of a mold sample he's studying.
** Fans reaction to Abaddon since her promotion to part of the BigBadEnsemble of season nine has been quite positive..
** Benny the {{badass}} FriendlyNeighborhoodVampire [[spoiler:[[LikeABadassOutOfHell from Purgatory]]]], who teams up with Dean and calls him "brother". Being one of the show's latest [[TheWoobie woobies]] only sealed the deal.
** [[TheCutie Heaven's most adorable angel]] AKA Samandriel has the quite the devote fanbase as well. [[spoiler:His death only increased it]].
** [[DarkActionGirl Meg]]. Like every other female character, she definitely gets her share of hate, but as the longest-running secondary character on the show, she's also amassed a loyal fanbase [[spoiler: and there are campaigns to bring her back after she was abruptly killed off in "Goodbye Stranger".]]
** Charlie Bradbury is definitely this, especially with gay/lesbian fans since she's the only lesbian character of any significance in the entire history of the show. It's not hurt by the fact that she's treated with much more respect than most other female characters in the show, brings out Dean's more geeky tendencies and (in season 8) stars in geek-themed episodes, and manages to become one of the very few surviving recurring characters.
** Linda Tran has quite a large fanbase, who are clamoring for [[spoiler:her off-screen death in Season 8]] to be revealed to be fake. [[spoiler:[[SavedByTheFans Their voices have been heard!]]]]
* EscapistCharacter: Charlie is a female geek (like much of the show's fandom) who's smart, pretty, capable, and just vulnerable and flawed enough to be likeable. She even gets picked up in Sam's big, strong arms over the course of the episode. [[spoiler:She's a lesbian, so there's ''no'' chance [[DieForOurShip she'll interfere with the Sam/Dean ship and be castigated by the fandom for it]].]] It's almost as if they specifically designed her to make people demand a second appearance.
* EvilIsSexy: ''All'' the female demons (though [[CreepyChild Lilith]] only counts when she possesses a grown woman). There's also [[ClassyCatBurglar Bela]] and [[MotherOfAThousandYoung Eve]]. The Winchesters and Castiel count as well, whether they're possessed or JumpingOffTheSlipperySlope.
* FanonDiscontinuity: Castiel's nickname is officially spelled "Cass." It was never adopted by fans even after becoming available knowledge in favor of the one-S version.
* FanPreferredCouple: Destiel (Dean/Castiel) and Wincest (Sam/Dean).
* FoeYay:
** Bela and Dean ([[http://www.youtube.com/watch?v=6SsCwrxJ2_Y "When all this is over, we should really have angry sex"]])
** Sam to Bela (in a single [[EroticDream dream sequence]]).
** [[spoiler:Lucifer]] seems to want to have this with Sam. Sam's not biting.
** Castiel and Meg. Their interactions go way past just implying sexual tension, [[spoiler:even including a very hot kiss]]. They even [[spoiler:plan to have sex, though they never get around to it.]]
** Early on Sam and Meg. At one point she made sexual advances toward him while preparing to have him killed.
** Castiel and Crowley. Crowley specifically tells Castiel [[spoiler:during their deal: "You're the bottom in this relationship."]]
** And now Dean and Abaddon. Abaddon compliments Dean's "pretty green eyes" in "Clip Show" (when planning to [[EyeScream tear them out]], mind you) and admires the rest of his body in "Devil May Care", calling him the perfect vessel and talking about [[DoesThisRemindYouOfAnything forcing herself inside him]]. She even calls him "lover" at one point.
-->'''Dean:''' We going to fight or make out? 'Cause I'm getting some real mixed signals here.
** Demon deals are sealed with a kiss, and thus basically have this built in.
* FountainOfMemes: Despite (or perhaps because of) his SpockSpeak, almost every other line out of Castiel's mouth is meme gold.
* FunnyAneurysmMoment: In the sixth ep of season one, Dean says Sam's alright for lying and the truth sucks. That one came back to haunt them.
** "Cas, are you God?" Harmless in the fifth season finale. Too bad it was {{Foreshadowing}} for the sixth.
** Dean's line to Bela in "Red Sky at Morning": "What, Daddy not hug you enough?" Then [[spoiler:you find out Daddy hugged her a little too much]], to put it ''extremely'' lightly.
* GrowingTheBeard: While Season 1 was really quite good, "Devil's Trap" (or perhaps its first half--"Salvation") is widely believed to be the point when the show started to hit its stride.
** For specific eras, Jeremy Carver's turn as showrunner seems to have accomplished this around the time the "Men of Letters" subplot was introduced, after a spotty first half that left fans feeling that the SeasonalRot that had really set in during the previous year was just continuing on.
* HarsherInHindsight:
** Bobby's outburst in "Lucifer Rising"--"[Family] is supposed to make you miserable, you idiot! That's why they're family!"--becomes pretty cringe-worthy when you find out what his childhood was like in "Death's Door".
** Sam's words to Dean in the Season Six episode, "Let it Bleed" about [[spoiler: erasing Lisa and Ben's memories of Dean:]] ''Dean, I've seen you pull some shady crap before, but this has got to be the worst..." ''Come Season Nine, Dean has [[spoiler: tricked Sam into allowing the angel Ezekiel to possess him, and keeping knowledge of the fact from Sam.]]
** Dean's nightmare in "Dream a Little Dream of Me" has him confronting a version of himself who has died after his deal has expired, has gone to hell, and become a demon, with the demon Dean screaming "You're going to die! ''This'' is what you're going to become!" [[spoiler: Although he doesn't become a demon following his death at the end of season three, he does become one at the end of season nine.]]
* HesJustHiding:
** [[spoiler:Gabriel]], due to numerous fake-outs in previous episodes leading them to theorize that he faked his death again, the fact that God repeatedly resurrects [[spoiler:Castiel for choosing to fight against the Apocalypse and Gabriel choosing the same thing in the end]], and constant teases that he might not really be dead and rumors that writers are trying figure out how to bring him back to the show [[spoiler:he does return as a Metatron construct on S9 episode 'Metafiction', however, his status is left ambiguous. Time will only tell if he's back for good]]
** [[spoiler:Linda Tran]] for some. Eventually [[spoiler:turns out that she wasn't hiding, she'd been kidnapped and held hostage, but is still very much alive]].
* HetIsEw: For some of the fans. This also extends to real life. To give an idea: some of the [[RealPersonShipping Jared/Jensen shippers]] were seriously squicked by the idea that Jared and his wife's new baby was conceived via heterosexual sex.
* HilariousInHindsight:
** "Hammer of the Gods" has Odin, among other gods, as a cannibal. Then Creator/AnthonyHopkins would go on to play Odin in ''Film/{{Thor}}''.
** Dean humorously calls himself Franchise/{{Batman"" in "Bad Day at Black Rock". Three years later, Jensen Ackles voiced Batman's enemy and former sidekick Jason Todd/Red Hood in ''WesternAnimation/BatmanUnderTheRedHood''. Even better, he stops a man by throwing something which jams his gun, which is how Jason is stopped at the end of the film.
** Rick Worthy played a vampire. He was cast as Bonnie's muggle father on ''Series/TheVampireDiaries''.
** Before taking the part of Dean, Jensen Ackles appeared in the Marilyn Monroe biopic ''Blonde'', where he played the lover of Patrick Dempsey's character... a man named Cass.
** In ''Road Trip'', [[spoiler:Gadreel possessing Sam]] kills an angel possessing a teen idol inspired by Justin Bieber. A few days before the diffusion, Jared Padalecki tweeted against the singer.
* {{HSQ}}: Reaches stratospheric heights in the later seasons, although probably the largest contributors to this tally would be "Hammer of the Gods" and "Two Minutes To Midnight" which both consist mainly of [[SummonBiggerFish very powerful beings trying to kill each other]] and Sam and Dean trying not to get caught in the cross-fire.
** The last sixty seconds or so of the Season 8 Finale probably qualify.
* IronWoobie:
** Any hunter on the show would qualify, since hunters are usually created when their normal lives are ripped apart by some supernatural monster. Rather than drown in despair and alcohol, they pack up their lives, hit the road and chase those monsters.
** Castiel, ''especially'' in Season 5 when he's falling. But even after he's [[spoiler: re-angelfied and accepted into Heaven, he finds that he has to become the figurehead for an incredibly personal civil war between his brothers]], and he's more or less had to go it alone.
* JerkassWoobie
** Gabriel. It's rather sad when you consider that, given how easily Castiel recognized him [[spoiler: while the latter was being assaulted and blinked away in order to keep him from alerting the Winchesters]], that he has probably never had any interaction with [[spoiler:his family since he left them to avoid the fighting]]. He finally shows some loyalty (to humans) and [[spoiler:is killed by Lucifer]]. (To those who haven't forgotten his truly {{Jerkass}} tendencies in all the other episodes he's appeared in, his [[spoiler:KarmicDeath]] is indeed karmic.)
** Bela Talbot. Despite being a selfish person, some fans feel sorry for her because of her backstory. [[spoiler:She was sexually abused by her father as a young girl and made a deal to stop the abuse. She's then killed and DraggedOffToHell, presumably for eternity.]]
** Meg becomes this in season 7 and 8.
* LauncherOfAThousandShips:
** Dean. Let's see--he generates a disturbing amount of HoYay with any male he's in the room with, has enough FoeYay with everyone from Bela to Lucifer, and every straight woman on the show (except his own mother and Ellen) will attempt to get him into bed at least once. [[TeasingCreator The writers]] [[ShipTease haven't been helping, either!]]
** Castiel. If he's not being shipped with either one of the Winchesters, he's being shipped with Meg (Megstiel), Crowley (Crowstiel), or any and all of his angel brothers from Balthazar to Lucifer. And that's not even counting the people who ship him with [[ScrewYourself Jimmy Novak, Misha Collins, or even Godstiel and Leviathan!Castiel.]]
* LGBTFanbase: There's a reason this show gets coverage on [[http://afterelton.com AfterElton.com]]. As of season 9, the show also has at least one openly gay writer, Robert Berens.
* MagnificentBastard:
** Azazel. Even after his death, he's still able to pull the strings to complete his master plan.
** [[spoiler:Ruby]] tricks ''everyone else'' into [[spoiler:thinking she's a traitor, gains the trust of people like Sam and Anna (and a good chunk of viewers) who know that demons like her are evil, convinces Sam that it's a good idea to start drinking her blood and using his demon powers, tricks him into killing Lilith, and single-handedly almost destroys the brothers' relationship]]--which no other villain has come close to doing--[[spoiler:all without anyone realizing her true plans.]] And that's all ''without'' taking into consideration how much XanatosSpeedChess she must have played in each individual episode, like "[[spoiler:Jus in Bello]]".
** Crowley. Not only can he play XanatosSpeedChess like a master, he's done the ''one'' thing both the angels and demons have been trying to do since Season 1--get the Winchesters to do what he wants them to! Later in the season, we find out that [[spoiler:he's apparently also got Castiel working for him, and they faked his death]]. In the seventh season finale, Crowley even manages to [[spoiler:get his rival killed, capture an enemy Lucifer loyalist, kidnap a prophet of the Lord, ''and'' banish Dean and Castiel to Purgatory]]. Magnificent doesn't begin to cover Crowley's awesomeness.
*** Crowley gets bonus points for being the only BigBad on the show to [[GenreSavvy take the Winchesters seriously as threats.]]
** Lucifer is charismatic, calm, and calculating. He knows how to use people's emotional pain and doubts against them and actually succeeded in [[spoiler:gaining Sam as his vessel by season 5 finale]].
** [[spoiler: Metatron]]. He brings down ''[[spoiler:Heaven itself]]'' with his cunning.
* MemeticBadass: Dean, Bobby, and Castiel. For some reason, Sam, while also badass in-series, doesn't usually get portrayed this way in fandom. Sometimes the characters' {{Memetic Badass}}ery [[LampshadeHanging comes into play]] in-universe with other characters commenting on [[FamedInStory their reputation]], a cool quip they just made, or some show of {{badass}}ery.
* MemeticMolester: Meg, Azazel, Alastair, Lucifer, and Crowley tend to be seen as sexually harassing/abusing other characters (with a focus on the Winchesters), or just as sexual and creepy in general.
* MemeticSexGod: Dean. Monsters, demons, humans, and angels alike find him irresistible.
* MisaimedFandom:
** Fans seem do forget that [[DealWithTheDevil deals with the Devil]] are ''never'' a good thing and Sam and Dean are morally complex characters
** Some say that [[spoiler:Dean being the vessel that Michael needs]] makes him a special snowflake while at the same time robbing him of agency. The whole point of bringing it up was so that he could reject it and continue to fight in the human way.
* MoralEventHorizon:
** Gordon crosses it in "Bloodlust" when he tries to kill Lenore's nest and tortures Lenore, knowing full-well that they're {{Vegetarian Vampire}}s, but not caring. He didn't care if they were hurting people or not, [[VanHelsingHateCrimes he wanted to kill them just for being vampires]].
** In the two-part second season finale, [[spoiler:Ava Wilson]] establishes herself as now a remorseless murderer with TheReveal that she's responsible for killing [[spoiler:most of the other special children, including Andy and Lily]], and now aims to kill Sam.
** If [[spoiler:Jake Talley]] didn't cross it when he [[spoiler: fatally stabbed Sam]] in part 1 of "All Hell Breaks Loose," then he definitely does it part 2 when he takes control of Ellen and attempts to have her shoot herself. And unlike the first act where he was still reluctant to follow the yellow eyed demon's orders, here he becomes an outright CardCarryingVillain, mocking the hunters as he does it. [[spoiler: You can't really blame the revived Sam for shooting him by that point.]]
** Bela shooting Sam in the shoulder in "Bad Day at Black Rock" ''while'' he was cursed with fatally bad luck. If it hadn't been for Dean having the rabbit foot's good luck at the time, it could have easily ended up killing Sam. Bela would have taken the foot and left Sam and Dean to die had she not been forced to let them destroy it to save herself. Some of her actions later on were arguably justified by the circumstances ([[spoiler:she was trying to get out of her upcoming death and an eternity of {{Hell}}]]), but risking Sam's life just to prove a point had no excuse--she only did it to show Dean that she was dead-serious about stealing the rabbit foot and wouldn't hesitate to kill them to do it. InUniverse, she crosses it when she [[spoiler:steals the Colt from them in "Dream a Little Dream of Me".]]
** [[spoiler:Zachariah]] cheerfully torturing and threatening the Winchesters and their friends in "Sympathy for the Devil" to try to coerce Dean into [[spoiler:saying "yes" to Michael]].
** [[spoiler:Samuel Campbell selling his own grandsons out to Crowley in "Caged Heat"]] is seen as his crossing-over the MoralEventHorizon, in- and out-of-universe.
* {{Narm}}:
** In "Hookman", Lori's performance. Real!Meg's acting in "Are You There, God? It's Me, Dean Winchester" may also count.
** Sam dying [[spoiler:in Ava's vision]] in "Hunted" probably would have been a lot better if not for Sam's [[DullSurprise almost completely flat yell]] before the explosion.
* NeverLiveItDown: It's a common joke among the fandom to say that every girl Sam had sex with dies and they nicknamed Sam's genital "the peen of death", through there are girls that had sex with him and are still alive at this time.
* OlderThanTheyThink: To most Christian viewers, and other Westerners, Lucifer's origin story probably sounds unique. It's actually taken directly from Islam. The idea of Satan refusing to honor humanity in turn can be traced to the apocryphal Life of Adam and Eve written circa First Century A.D./C.E.
* OneSceneWonder: Samhain gets summoned and sent back to hell to never be seen again within the same episode.
* OnlyTheAuthorCanSaveThemNow: The show gets like this sometimes. The Winchesters have no magical abilities of their own and routinely go up against demons and monsters with telekinesis or other powers that render the boys' weapons (even the magical ones) totally useless. Yet something always allows the boys to pull out a win.
* OnlyTheCreatorDoesItRight: Many fans blamed the seasons 6 & 7 showrunner Sera Gamble for the show's less-than-stellar state after Eric Kripke, the creator and original showrunner, stepped down (though Kripke still had some input on the show). After season 7, Gamble also stepped down and was replaced by Jeremy Carver. Whether or not he's doing better than her is a bit of an issue amongst the fandom, but both are generally seen as inferior to Kripke.
* PanderingToTheBase: When it comes to the female guest stars, the show is certainly guilty of this. Jo was a love interest for Dean; she was hated by the fans and so got booted. Bela was introduced -- to say that she was hated would be an understatement -- [[spoiler:and she got ripped to pieces by Hellhounds (off-screen).]] It was then revealed that Katie Cassidy as Ruby had to leave too (However, that was because they didn't have the budget to pay for her return). Kripke has also ended up apologising for the oft-reviled "Red Sky At Morning" and a few other unpopular episodes. Ruby was a subversion before she got KilledOffForReal. It's revealed in season four that she simply got a new meatsuit [[spoiler: after being forced out of the old one by Lilith]].
* RelationshipWritingFumble: With all their touchy-feely clinginess and suicidal co-dependent devotion canon, even the creator of the show has admitted that he can see why the [[YaoiFangirl fangirls]] see HoYay in the brothers' relationship.
* RescuedFromTheScrappyHeap:
** Bela in "Time is on My Side". It helped that her background and her motivations were ''finally'' shown, helping viewers who were annoyed by her selfish personality understand her better and feel sympathetic. [[spoiler:Doubles as an AlasPoorScrappy moment]].
** Jo. It arguably began in "Born Under a Bad Sign", when she showed up [[BrokenBird sadder, wiser, and older than before]] and went through an ordeal that had even some haters sympathizing with her and saying they wouldn't mind her reappearing if the writers continued to portray her as a little sister-type figure rather than as a LoveInterest. The process was completed when she TookALevelInBadass, amusedly turned down [[MustNotDieAVirgin a night with her old one-sided crush Dean]], and made a [[spoiler: beautifully written, horribly sad HeroicSacrifice]] in Season 5. [[spoiler:Also an AlasPoorScrappy]].
** Suddenly, after a whole season of hating her, fans like (or at least don't mind) Katie Cassidy's portrayal of Ruby after Genevieve Cortese showed up.
* RetroactiveRecognition:
** Due to how long the show's been on now, newer fans watching the earlier seasons will probably recognize season three's additions of Ruby and Bela respectively as [[Series/{{Arrow}} Laurel Lance]] and [[Series/TheWalkingDead Maggie Greene]].
** Many people might recognize Dr. Garrison from the season 3 episode "Bedtime Stories" as [[Series/BreakingBad Ted Beneke]].
* RomanticPlotTumor: Sam/Amelia in Season Eight.
** Ignoring Garth isn't that much of a deal breaker, as Supernatural is the story of the Winchesters. No, what pushes this into Romantic Plot Tumor territory is that Sam and Amelia's romance serves no purpose in the story and doesn't deepen our understanding of the characters.
* TheScrappy:
** Ruby was hated before she even debuted, thanks to [[TrollingCreator inflammatory press releases claiming that she was a new hunter being introduced who was better than Sam and Dean]]. Fan-hate only grew when she started to come between the brothers and seemed to be encouraging Sam's dark side, which made the brothers have their first real rift in their relationship (and made fans take sides with their preferred brother, [[BrokenBase breaking the fanbase]] for the first--but not last--time). It doesn't help that the two actresses who play her most of the time (Katie Cassidy and Genevieve Cortese) aren't well-liked.
** Fans liked [[spoiler:Metatron]] well enough... until it was revealed that he was manipulating [[EnsembleDarkhorse Castiel]] for his own ends and he [[spoiler:cast all the angels out of Heaven after killing Naomi]] for the sake of (misplaced) [[DisproportionateRetribution vengeance]]. In the space of ''one episode'', he went from loved to hated. Don't be surprised if fans now say he's worse that [[{{Satan}} Lucifer]].
** Amelia brought in as a love interest for Sam in the first half of Season 8. She was received so badly by the fandom that not only did the writers acknowledge it, she received only a single scene in the [[PreviouslyOn Season Finale Recap]] despite being in a third of the season's episodes. Part of why she's so hated is that the writers intended for her to be the reason why Sam quit hunting and didn't look for Dean.
* SeasonalRot:
** Season 3: ExecutiveMeddling led to Bela and Ruby, the audience was always reminded that Dean only had one year to live, and the season premiere ("The Magnificent Seven") was too bright and shiny. It was also weakened by the Writer's Strike, which cut it down from 22 episodes to 16--thus making the story-lines of the last four episodes rushed and abandoning great ideas, like the return of Ellen Harvelle (it was pushed back to Season 5). The amount of rock music was greatly reduced and so were the special effects. It had good ideas with Bela and Ruby, but over-focusing on the two over the brothers led to fan derision and probably contributed to [[spoiler:Bela being killed off]]. New episodes were hardly ever promoted (with other shows airing on the same network getting far more publicity) to the point where some fans honestly wondered if the head of the network was trying to get the show canceled.
** Season 4 and Season 5, with their considerable retooling of the MythArc, heavy use of Christian mythology, and larger cast, were looked upon more favorably by newer fans, and generally less so by older ones. Season 4 was a grittier improvement, but Genevieve Cortese was generally reviled in her portrayal of Ruby throughout the fanbase, and many fans really missed Katie Cassidy (fans that weren't nearly so loud when she was actually onscreen the previous season). This turned out in favor of the newer fans, as Season 4 boosted the show's sagging ratings enough to ensure there would be a Season 5.
** Season 6, with its "return to form" approach, might have pleased some older fans with its drastically pared-down cast and concentration on the Winchester brothers' newest trust issues, but [[ItsTheSameNowItSucks turned off newer fans]]. The ratings ''aspire'' to be Season 3. To a good number of the fanbase, the meta episode "The French Mistake", where the Winchesters somehow stumble into the actual set of the show, proved that the writers were clutching at straws after abruptly abandoning the [[spoiler:soulless-Sam]] plotline. It didn't help that the episode was right after a [[MoodWhiplash far too peppy]] "monster of the week" plot (not dissimilar to those that permeated earlier, less angsty seasons) and the introduction of a new, somewhat derivative BigBad after ''more than half the season'' was over.
** While Season 6 had its flaws, and definitely suffered the loss of the original show runners, Season 7 had ''Supernatural'' showing its age badly. Concurrent with [[spoiler:Castiel]]'s abrupt death and the Leviathans. The other monsters were barely menacing, [[spoiler:Bobby died]], Crowley made a scant few appearances before vanishing from the story, and the Dean/Sam drama got so overplayed that half of the dialogue was about how overplayed it is. As the season progressed, however, the Leviathans gradually became much more terrifying and threatening as their plans progressed. On top of that, [[spoiler:Castiel returns and develops further as a character, while Bobby gets an impressive ghost-arc which ties up his character quite nicely.]]
** Reversed partway into season 8, when the show ''re''grows the beard around the time the Men of Letters were introduced.
** Back with a vengeance in Season 9, what with lack of continuity and [[spoiler: Kevin Tran's death.]]
* ShipMates: A [[FanPreferredCouple Destiel]] writer often hooks [[CrackPairing Sam and Gabriel]] up as a BetaCouple if they feel an urge to [[PairTheSpares pair Sam off with someone]], and vice-versa.
* SongAssociation: ''"Carry on my wayward son... there'll be peace when you are done..."''
* {{Squick}}: Some of the heavier gore is just too much for some to handle.
** Sam's fingernail being pulled out in "A Very Supernatural Christmas".
** The teeth and maggot scenes in "Malleus Maleficarum."
** The end of "Hammer of the Gods," when Pestilence spews mucus all over everything.
** "Caged Heat". The room in which Dean is attacked by ghouls.
* TheyChangedItNowItSucks: Varies by season, writer, intelligence of watcher, and religious views.
* TheyWastedAPerfectlyGoodCharacter:
** Missouri Moseley, the psychic from the first season. She was funny, had her head on straight, and had great chemistry with the boys that made her seem like a stern grandmother. Despite all that, and having known John well, she never appeared again. Sure, with this show's track record, she'd probably be dead by now, but it's still a shame that she only appeared in one episode.
** Cassie Robinson, also from the first season, had great potential to be a love interest for Dean, as she was one of the few women from his past that he was shown to truly love and he was the one who promised to return to her despite her insistence that it wasn't going to work. She never appeared again.
** Meg's "brother" Tom. He seemed just as powerful as her, but was much more cold and focused. He could've been an interesting contrast to Azazel and Meg's personalities. He played a large role in one episode, and briefly appeared in the following one where he was killed by Dean.
** Eve was an interesting and powerful new villain who was hyped up for most of Season 6 as the BigBad. She could disable angelic powers, so Cass being overpowered wouldn't be an issue. Her being the villain would make even non-mytharc MonsterOfTheWeek episodes exciting, as it provided a reason why the Winchesters were hunting small-time cases instead of focusing on the BigBad (they could be tracking down Eve's children to interrogate and such) and Eve could use her children to spy on them and also create new monsters the writers could come up with whole-cloth. Unfortunately, she was killed before the season was even over.
*** There's also the fact that her motivations were actually sympathetic (she just wanted to protect her children) and had no real animosity towards mankind in general. This is never really explored at all.
** Season 8 had this problem in multiple instances, due to having too many characters lying around and therefore killing a lot of them off when they're no longer important or convenient to have around. Examples include:
*** Samandriel, one of the few angels who wasn't a total jerk, gets killed by Castiel at Naomi's command after providing a bit of plot-relevant information. The "waste" comes in when you realize he would have been a great fit for the [[spoiler: fallen angels]] plot that arises at the very end of the season.
*** Meg, the only remaining recurring character from Season 1 except for the Ghostfacers, had interest in Castiel, wanted to stop Crowley, and was considering redemption. Makes her a perfect candidate for the "cure a demon" trial, right? Except she's killed ingloriously by Crowley defending the Winchesters and Castiel before the trial in question is even introduced.
*** Naomi, after being hyped all season as a villain who heads heaven's Secret Service and had history with Crowley, does a brief HeelFaceTurn and is promptly killed off as her role as Castiel's manipulator and the focus of the heaven portions of the arc are both hijacked by Metatron.
*** Benny. {{Badass}} FriendlyNeighborhoodVampire, Purgatory veteran, and ally to Dean at a time when he didn't have many. But he was the center of a Sam/Dean conflict, so he had to go.
** Kevin. He's gone from an AsianAndNerdy stereotype to losing everything in the span of one year; his future, his mother, and his girlfriend, and becoming a tired KnightInSourArmour at a very young age, even outsmarting Crowley. In his last appearance, after [[WhatTheHellHero calling Dean out for ruining his life]], a possessed Sam murders him, because according to him "It's for the best".
** Ava Wilson has a great introduction as a completely normal person drawn into the story against her will, and is mysteriously kidnapped by the Yellow-Eyed Demon at the end, leaving all kinds of possibilities open. Then she returns, having gone through an offscreen FaceHeelTurn, and is anticlimactically killed off.
** Agent Henrickson proves to be a quite worthy ally after learning the supernatural is real, and could have been a great recurring character as he tries to come to terms with it further while keeping up his job. Instead, Lilith DroppedABridgeOnHim. Especially notable because the WordOfGod about why he was killed off doesn't even make sense: after the writer's strike cut the season short, they didn't want Sam and Dean hunted by the FBI for another season... except Henrickson had already cleared that up by the time he was killed.
** Ellen and Jo have fewer appearances than you'd think given their early prominence in season 2. Afterwards they missed two entire seasons and then returned simply to be killed off in a SenselessSacrifice for a plan that never had a hope of working (and incidentally, getting rid of the only recurring heroic female characters at the time).
* TooCoolToLive: Gordon Walker, Ash, Henriksen, Pamela, and [[spoiler: Kevin]].
* TrueArtIsAngsty: Granted, there's [[MoodWhiplash funny]] and there's [[BreatherEpisode Breather Episodes]] scattered here and there, but try sitting through an episode like "What Is And What Should Never Be?" It's widely considered to be a truly fantastic episode, yet it's forty minutes worth of pure pain.
* UncannyValley:
** Castiel doesn't blink nearly enough, combined with his trademark thousand-yard stare and deadpan expression.
** In "The End", Lucifer doesn't quite seem to know how to work his--or rather [[spoiler:his vessel Sam]]'s--face. It's one of the creepier bits of the show.
** Death, like Castiel, rarely blinks.
* TheUntwist: Lilith holding the contract for Dean's soul. Considering the only other demon of any importance at that point was already dead, it's a bit weird that they even tried to play this as a twist.
* VillainDecay:
** The Leviathans, to some.
** Meg in seasons 1 and 2: Remorseless demon who commits multiple murders, tortures the Winchesters, [[DemonicPossession possesses Sam]], kidnaps Jo and [[BreakThemByTalking traumatizes her]]. Meg in seasons 6-8: [[DeadpanSnarker Snarky]] IneffectualSympatheticVillain and sort-of LoveInterest for Castiel.
* VillainSue: Bela and Crowley. Both of them consistently catch the Winchesters flat-footed, to the point of making many viewers wondering if they have some kind of permanent spell about them that reduces the Winchesters' IQ points. Crowley, however, does it more through being smart than blind luck.
* WhatAnIdiot: Minor character Garth, a hunter we only hear on the phone with Bobby asking him for advice on a vampire case in season 6. Bobby tells him to call the FBI to handle it, but Garth calls Bobby's fake FBI number instead. We finally meet Garth in a Season 7 episode and it seems he really is that stupid in person, although even Garth thought the victim of the week was an idiot for selling her soul. As of Season 8, Garth seems to have [[TookALevelInBadass ground a few dozen levels]], stepping into Bobby's shoes and edging away from this and into BunnyEarsLawyer territory.
* YokoOhNo: Any woman that Jared or Jensen dates/marries is going to get this ''hard'' from the FanDumb, mostly from the [[RealPersonShipping RPS]] crowd. For example: when Jensen's girlfriend tagged along with him to a convention, one of the fangirls "jokingly" [[http://www.journalfen.net/community/fandom_wank/1202644.html asked security to kick her out]]. And let's not even go into the garment-rending that ensued when [[http://www.journalfen.net/community/fandom_wank/1282606.html Jared's wife got pregnant]].

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