* AlternateCharacterInterpretation:
** Is Hiccup a BadassPacifist because of the trauma that resulted from him and Toothless killing the Red Death? Or is it simply him trying to impose an unrealistic ideal on an imperfect world?
** Alvin explains that he got banished from Berk [[spoiler: for causing casualties by disobeying orders]] (probably unintentional) and is now quite willing to let Berkians like Hiccup get eaten by dragons (unambiguously intentional). Did he become more hard-hearted over time, or did Stoick see the ugly side of him?
** Mala provides an in universe in regards to Berk--she [[spoiler: questions whether Hiccup and his riders fly WITH the dragons, or have in a way subjugated them via a softer hand.]]
* AngstWhatAngst:
** Averted with Hiccup. He still has some lingering self-esteem and image problems that he had in the movie. Seeing as he was ostracized by his entire community up until recently, this is very understandable. Played straight, however, with Hiccup seemingly having no issues whatsoever with his prosthetic foot. Any comment he makes about it is incredibly snarky, but with no trace of angst.
** Considering that most of the adult men of Berk have at least one prosthetic, this isn't all that surprising. Losing a limb seems more like a mark of pride than anything else in their culture.
** Averted with Heather. For good reason, she has a lot of baggage [[spoiler: especially after Dagur kills her parents, then later finds out he's actually her brother]].
* AuthorsSavingThrow:
** After the second film was directed by someone who had no involvement with the series and openly stated he made no effort to keep it canon, ''Race to the Edge'' goes to some lengths to reconcile the differences so people aren't forced to choose which canon they prefer.
** Ruffnut in the first season got less screentime and dialogue because her voice actress couldn't keep up with TJ Miller's improv, much to a lot of fans' ire. Come season four, she has about several episodes focusing on her relationships with the other riders.
** Likewise, the viewers noticed that Hiccup had little to no leg problems given his amputation and it sometimes doubles as a DisabilitySuperpower. In season four, one episode has a RunningGag of Hiccup getting his prosthetics damaged.
** The hints that Dagur killed his father came across as [[GettingCrapPastTheRadar "you know what we mean, but the censors won't allow us to say it outright,"]] not as "the audience is supposed to wonder if he did it or not." So the revelation in Season 5 that [[spoiler:he didn't kill his father after all seems like a RetCon to make the character more sympathetic and his [[EvenEvilHasStandards deep respect for blood ties regarding his sister]] not seem out of character.]] [[TropesAreNotBad Not that any fans are complaining.]]
* [[SugarWiki/AwesomeArt Awesome Animation]]: The animation is at times on par with the original movie, which is quite impressive for a weekly animated series.
* SugarWiki/AwesomeMusic:
** Most of the {{leitmotif}}s from the original film show up in series, with several new arrangements of each appearing.
** "Tone Death" lets the cast show off their singing skills, with special mention to Heather's lullaby and Hiccup's ballad about the first film's events.
* BrokenBase:
** Dagur's new look as of "Race to the Edge". While most admit the shorter-hair-after-being-a-prisoner is pretty accurate, a lot of people do not like the beard. And even those who don't mind the idea of Dagur growing a beard don't like how patchy his is. And people apparently really miss his Loki-helmet.
** Heather and Fishleg's getting ShipTease in season three of ''Race to the Edge'', on the one hand both are popular characters that could use the focus, on the other given that the show makes strides to stay in the canon of the movies this means that no matter what the relationship will ultimately go nowhere since in the second movie Fishlegs and Snotlout are competing over Ruffnut.
* CounterpartComparison: More than once has the ''WesternAnimation/AvatarTheLastAirbender'' fandom theorized that several citizens of Berk and its surrounding islands are descended from characters of that series.
** Hiccup, like Aang, not only is a pacifist who prefers peacemaking to violence, not only has a boy just a few years older than him obsessively stalking him, but has an inseparable bond with and rides a flying creature who, by all appearances, is the LastOfHisKind. Add in the flight suit he likes using, and it's been unanimously decided that, in another world, Hiccup would definitely be an Airbender.
** Even if they didn't have [[Creator/MaeWhitman the same voice actress]], Heather undergoes almost the same journey in "Have Dragon, Will Travel" that Katara does in "The Southern Raiders" -- tracking down the murderer of her parent(s), despite the protests of the hero, only to find when the time comes that [[spoiler:she can't kill him]]. Both also have no problem stealing from/looting pirates.
** Dagur is basically a {{Gender Flip}}ped version of Princess Azula, both being TheCaligula with a preference for lightning. His interaction with Alvin in "A View to a Skrill" mirrors Azula's with Long Feng in "Crossroads of Destiny" ([[spoiler:the younger villain forms an alliance with the more experienced, older villain, only to successfully double-cross them and take over their army]]).
** Berk and the Earth Kingdom even both have a cabbage merchant who's constantly getting annoyed by the heroes' antics.
* CrazyAwesome: Dagur the Deranged. In his second appearance, he takes down Toothless in a sneak attack, and later on weaponizes a Skrill against the Outcasts.
* DieForOurShip:
** Heather received hate before she even debuted. When it was said that she might "threaten Hiccup's love for Astrid", the shippers went nuts. This became HilariousInHindsight once she actually showed up -- see HoYay for why...
** Some shippers are also like this with [[FoeYayShipping DagCup]], the Dagur and Hiccup ship. Poor Astrid usually loses her CharacterDevelopment so that the Berserker and Hooligan's relationship can exist.
* DracoInLeatherPants: Dagur gets this treatment in fanfiction, usually to justify why he is psychotic and to make him appealing. The fact that he's the youngest villain, not to mention the most competent, wins the crowd quite a bit.
* EnsembleDarkhorse:
** Heather proved to be pretty popular after her first two-parter, enough so to get another one in season three that also begins a character arc, promoting her from GirlOfTheWeek to HonoraryTrueCompanion.
** Fans quickly became attached to the chicken Tuffnut bonds with in ''Race to the Edge''.
* FandomRivalry: With fans of ''WesternAnimation/GreenLanternTheAnimatedSeries'' and ''WesternAnimation/YoungJustice'' after the WesternAnimation/DCNation block was put on hiatus for nearly three months with reruns for this show.
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* FunnyAneurysmMoment:
** Astrid's zeal in being a dragon slayer in the movie. Just her being a typical Berk Viking and actually being competent at it, right? Now consider how her uncle died and the effect it had on her family's honor and suddenly it takes on a chilling tone. [[FridgeHorror She is unlikely to be the only case like that.]]
** The villagers' excited chanting of "VikingFuneral" [[spoiler: since Stoick's in the sequel]].
* GeniusBonus:
** The writing system used in both the movies and series is a real alphabet known as the FUTHARK, commonly referred to as "Runes". The ancient Vikings used it both as a written language and considered each letter to be a powerful magic, which is still used in many occult practices.
** In season three, we see what look like strange triangles all over ''The Reaper" and in the projections of the Dragon Eye, this is a writing system known as Cuneiform, considered by many historians to be the oldest form of written language in the world, predating even ancient Egyptian Hieroglyphs
* GrowingTheBeard: While most people agree that season 1 and 2 are far better than any recent series based on an animated movie, ''Race to the Edge'' has blown all expectations out of the water with just its first thirteen episodes, with much better writing, CGI effects, and character designs. All in all it seems Netflix has managed to make a decent show into a ''great'' show.
* HarsherInHindsight:
** ''Every episode'' that features Stoick after HTTYD 2, "Crushing It" deserves special mention, when he starts suffering Empty Nest Syndrome.
** Everything about Heather when she returns in season three. The biggest probably has to be what she told the Berkians initially about pirates attacking her village and leaving her an orphan, [[spoiler: which was a lie]]. Three years later, her words come back to haunt her [[spoiler: when Dagur destroys her village and kills her foster parents]].
** "A Grim Retreat" becomes even more distressing since [[spoiler:the scene with a mind-controlled Toothless about to kill Hiccup happened in HHTYD 2, which led to Stoick's death.]]
** "Stryke Out" has a scene showing the matches from Toothless' point of view, that point of view? Exactly the same as when he was being mind-controlled by the Bewilderbeast to attack Hiccup.
* HilariousInHindsight:
** Stoick going to consult an unintelligible oracle in "Animal House", after his original voice actor GerardButler was known for doing the same thing in ''Film/ThreeHundred.''
** The FoeYay between Hiccup and Dagur, after David Faustino's [[WesternAnimation/TheLegendOfKorra other big show of the time]] ended with a canon gay couple, which his own character started out standing in the middle of.
* HoYay: [[HoYay/DragonsRidersOfBerk See here.]]
* IdiotPlot: Tuffnut spend an entire episode trapped in a net with Barf and Belch nearby all because nobody could think of the most obvious solution to get him out: have one head simply bite or burn the net while the other head is placed under him for him to sit on.
* InformedFlaw: In Season 5, the dragon riders repeatedly mention how "obsessed" Hiccup has become with beating Viggo. The way they talk, you'd think he was turning into [[WesternAnimation/TeenTitans Robin after the latter met Slade]] or Harry Potter in [[Literature/HarryPotterAndTheHalfBloodPrince Book 6]]. Outside of easily falling for a relatively obvious trap of Viggo's, however, Hiccup ''never'' acts darker, out of character, or any more "obsessed" with this villain than he has with any others; there's nothing out of character, excessive, or unjustifiable about the level of determination he shows or effort he puts into fighting him.
* JustHereForGodzilla: Face it, at least a fourth of this show's audience is just watching to see the new dragons.
* MagnificentBastard:
** As of "We Are A Family", Alvin has attained this status after [[spoiler: performing a plan that would involve Mildew being betrayed and forced to work with Hiccup, [[BatmanGambit knowing full well Hiccup's overly trusting nature]] would end up teaching Mildew the training techniques while trying to escape. They think Mildew preformed a HeelFaceTurn and HeroicSacrifice without realizing that he was acting so Alvin can learn the art of dragon taming]].
** Season 3 also has Viggo, whose first appearance was a two parter that [[spoiler:ended in TheBadGuyWins, pulling a XanatosGambit against Hiccup, even when Hiccup began to outwit him.]]
* MoralEventHorizon:
** Mildew crossed it in "Alvin and the Outcasts". Getting the dragons exiled was bad enough, but then he intends to sell Hiccup out to the outcasts. And just to make sure the viewer knows this isn't a "needs of the many" kind of choice, he gloats about it to Astrid.
** Alvin himself crosses it by [[spoiler:threatening to kill Heather's parents to force her to be TheMole.]]
** It's heavily implied Dagur crossed this a while back by killing his own father. With an axe, no less. And if that doesn't do it for you, the reveal that [[spoiler: he killed Heather's foster parents and most of her village certainly will.]]
** Heather herself nearly crosses it by [[spoiler: attempting to murder Dagur]] after saying that they would only capture, but Hiccup revealing that [[spoiler: Dagur is her brother]] stops her. Though it's implied that during the time skip she is [[spoiler: willing to use lethal force]] on InnocentBystander Vikings while raiding their ships.
* {{Narm}}:
** Hiccup delivering a line foreshadowing the second film's wing suit ''directly to the camera'' in "Gone Gustav Gone," like something out the pre-GrowingTheBeard Dreamworks films.
** "This changes everything." Besides being uttered every time in the opening, when Hiccup first uses the line he had just discovered the dragon eye's projections and couldn't even read the symbols it displayed, making the line feel somewhat nonsensical.
** Hiccup shouting at Dagur, "I HATE YOU, YOU HEAR ME?! I HATE YOU!" in "Enemy of my Enemy" like a 5-year-old yelling at their parents.
* NonIndicativeName: "Race To The Edge." There's no urgent need to get to the "Edge," and the "Edge" refers to the Dragon Riders' new home base, the Dragon's Edge, which they spend most of the series based out of. Aside for a few competitions or episodes where they have to stop raiders, there's no urgent, overwhelming need to get there as fast as possible.
* OneTrueThreesome: Hiccup and Astrid are the canon OfficialCouple as well as easily the biggest FanPreferredCouple, so its easy to see that no one is getting in the way of that. So when Heather formed a deep bond with both of them, fans were quick to just ship all three together rather than split Hiccstrid.
* RescuedFromTheScrappyHeap:
** [[spoiler: Mildew]] has one after suffering a MyGodWhatHaveIDone moment. [[spoiler: Subverted when it is revealed he was working with Alvin the whole time.]]
** Heather seems like this after [[spoiler: its revealed she only joined Dagur to serve as the mole for the Dragon Riders in ''Race to the Edge'']].
** Spitelout gets a bit in "Turn and Burn," which explores his insecurity about Stoick's natural leadership abilities and constantly trying to prove himself, and he gets enough development to KnowWhenToFoldEm and have enough confidence to start over when his first choice to build an offshore storeroom has to be abandoned.
* RonTheDeathEater:
** Astrid and Heather are usually subject to these, often on opposing sides.
** Don't even get started on the numerous fanfiction stories that portray Stoick the Vast as an [[AbusiveParents Abusive Father]] that starves Hiccup and neglects him.
* TheScrappy:
** Mildew wasn't exactly well-liked considering his desire to get rid of Toothless and the dragons, but the events of "In Dragons We Trust" [[spoiler: where he frames and ''succeeds'' in exiling them has driven the last nail in]]. Then the hate for the guy skyrockets with each attempt to restore the status quo at the expense of the dragons, such as [[spoiler: trying to poison, which could kill, the dragons]]. Heck, he's even TheScrappy In-Universe!
--->'''Bucket''': It took us three days to dig Mildew out!
--->'''Mulch''': And the rest of our lives to wonder why we bothered...
** Snotlout's dad may have joined him. Outright threatening your kid for the possibility of not winning a game (one that the kid has won plenty of times before, to boot), and the sheer panic Snotlout displays when he thinks he'll lose (indicating that his dad was totally serious), has made him pretty divisive. He got a KarmaHoudini too, since Hiccup just let Snotlout win instead of addressing the real problem with someone. Then he has a KickTheDog moment in "Race to Fireworm Island" when he advises Snoutlout to abandon an ill and dying Hookfang and find another dragon.
* SpecialEffectsFailure:
** Though the animation is pretty good, the series tends to stumble in action sequences, particularly dragon breath. By watching episodes like "The Terrible Twos", it's obvious they put extra effort into the fight scene near the end of "Alvin and the Outcasts".
** The physics of the show are quite schizophrenic; some episodes use full-on motion capture for the human characters, while others use stiff-looking manual rigging for all motion. Watch an episode such as "Portrait of Hiccup as a Buff Man" with this in mind, and it becomes difficult to take your mind off the blocky and robotic motions of the characters.
** An especially jarring thing about the animation is the hair. Hiccup's hair almost always gets a lot of detail, while the other's don't. So you go from a closeup of Hiccup riding Toothless and his hair is moving just like it would in real life, and then you go to a close up of the twins and their hair (which is much longer than Hiccup's) is separated into three chunky blocks that move very unrealistically.
** There's a definite upgrade once the show moves onto Netflix, with realistically-moving hair, and more accurate CGI.
* StoicWoobie:
** Stoick, especially when he [[spoiler: chooses to let Thornado go to rescue baby Thunderdrums and take care of them]]. It takes him another season to admit that he [[spoiler: misses Thornado]].
** Gothi is revealed to be this, given she survived an attack [[spoiler: from a Snow Wraith]] that killed her companions while on a quest to find healing glacial water.
* UglyCute: Dragons, as usual. Particular mention goes to Meatlug the Gronckle, Fishlegs's placid and spectacularly ugly GentleGiant of a mount.
** Toothless, unlike other dragons, is just cute. And Atrid's Stormfly is beautiful. They share these traits with their riders.
* ViewerGenderConfusion: Many viewers keep confusing who is named Ruffnut and who is Tuffnut. For the record, Ruffnut is the female (higher pitched voice and thinner helmet horns), and Tuffnut is the male (deeper voice and thicker helmet horns).
* TheWoobie:
** Hiccup, every time Toothless is in danger like in "When Lightning Strikes," and in "Portrait of a Hiccup as a Buff Young Man."
** Heather, in ''Race to the Edge'', almost becoming a WoobieDestroyerOfWorlds.
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