* AngstWhatAngst: Averted rather beautifully 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.
* AwesomeAnimation: The animation is at times on par with the original movie, which is quite impressive for a weekly animated series.
* AwesomeMusic: Most of the {{leitmotif}}s from the original film show up in series, with several new arrangements of each appearing.
* CompleteMonster: Dagur the [[AxCrazy Deranged]] is the [[NamesToRunAwayFromReallyFast suitably named]] leader of the Berserkers who usurped control of his tribe by [[{{Patricide}} killing his pacifistic father]]. Dagur comes to Berk to sign a peace treaty in the blood of a Hideous Zippleback that's tied down and helpless against him, not knowing Berk has tamed dragons. Dagur later finds out the truth about the dragons on a dragon hunt with Hiccup. Dagur [[ItsPersonal takes this personally]], declaring war on Berk, and seizing control of the Outcasts by [[ShockAndAwe almost fatally electrocuting its previous leader]], [[BigBad Alvin]]. Dagur tries a multitude of tactics to destroy Berk, from creating a catapult to capture dragons and their riders, to stealing Berk's metal and leaving it vulnerable to attack. This culminates in Dagur implanting dragon root inside Berk's academy, sending the Viking's dragons into a violent frenzy to attack human or dragon, whilst Dagur holds Hiccup's friends hostage. Once defeated by the NotQuiteDead Alvin, Dagur flies into a rage and kidnaps Stoick as a hostage, and is ultimately defeated when he tries to steal the Screaming Death and separate it from its mother. Dagur is [[BloodKnight notoriously and joyously violent]], [[KnifeNut throwing knives]] at Hiccup and keeping his friend in a cramped cage for a day, feeding him rotten fish heads. On one record, [[BadBoss he threatened to chop off the legs of one of his soldiers (who was actually a hero)]] [[DisproportionateRetribution for a petty reason]], and ultimately wants to start a war [[WarForFunAndProfit solely for kicks]]. A [[WarHawk warmonger]] and a [[TheSociopath sociopath]], Dagur stood out as the only truly irredeemable villain in ''Riders Of Berk.''
* 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, not only in that she treated Hiccup more or less like all the other boys, but in that "Heather Report 1&2" is more about Heather's relationship with Astrid than her relationship with Hiccup. Not to mention when Heather is leaving Berk she totally ignores that Hiccup clearly has his arms open for a hug, just saying goodbye to him while still hugging Toothless and Astrid. Really, she's more likely to interfere with Hiccup/Astrid due to LesYay with Astrid than stealing Hiccup away! Happens again in when she returns in season three with a similar result.
** Some shippers are also like this with [[FoeYay DagCup]], the Dagur and Hiccup ship. Poor Astrid usually loses her CharacterDevelopment so that the Berserker and Hooligan's relationship can exist.
* DracoInLeatherPants/ EvilIsSexy: 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:
** The twins. This is mainly because both of them are a ''walking'' CrowningMomentOfFunny.
** Heather has proved to be pretty popular after her first two-parter, enough to get another one in season three that also begins an arc that will surely mean she will be showing up again.
** The chicken Tuff 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.
* FoeYay: Between Dagur and Hiccup every time they interact, starting in "The Night and the Fury"; lampshaded by the latter as being rather uncomfortable. Indeed, at the end of the episode, Dagur seems more upset by Hiccup personally betraying him than Berk's possession of domesticated dragons. Just ''look'' at Dagur's behavior as well! He wanted to spend time with Hiccup and gets annoyed when his friends keep showing up, is angry upon learning of the bond between Hiccup and his bond (implying clingy possessiveness), and mentioned he couldn't stop thinking about him ever since the Berk incident. He wants Hiccup to "kiss his boots" in one episode, and obsesses over it. Get's even more blatant in ''Race To The Edge'', when Dagur sets up a SadisticChoice he is actually disappointed Hiccup would choose to rescue his friends over fighting him.
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* FunnyAneurysmMoment:
** Anything Bucket does, once you find out in "Portrait of Hiccup as a Buff Man" that he acts the way he does because a dragon ate half of his brain. Although this was actually implied from the first episode, when part of one of Mildew's anti-dragon diatribes involves pointing out that Bucket took the head injury that requires him to have the bucket welded to his skull as a makeshift plate from a dragon.
** 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 are 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: 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]].
* 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 RunningGag in ''Live and Let Fly'', a mishap with the grappling function of Hiccup's shield caused Gobber and Hiccup (later, Stoick) to be pulled together in a SuggestiveCollision. Following the WordOfGay in regards to Gobber in ''WesternAnimation/HowToTrainYourDragon2'', his awkward "hope no one is looking" comment is rather amusing.
* HoYay:
** ''Race To The Edge'' gives more than a little HomoeroticSubtext between Snoutlout and Thor Bonecrusher, [[spoiler: AKA hypnotized Fishlegs]], Astrid even says Snoutlout is in love with him, and when [[spoiler: Fishlegs returns to normal]] Snoutlout kisses him on the cheek and says Bonecrusher broke his heart.
** Astrid and Heather had some LesYay in season one, but season three turns it UpToEleven. The two become so close you would think they had been best friends since birth.
* 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.
* 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: preforming 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]].
* 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.]]
* NightmareFuel
** The Screaming Death is a MUTATED Whispering Death, second only to the Red Death in terms of size, and one of the most dangerous dragons seen. It's even in-universe Nightmare Fuel for the dragon riders and they can be seen clearly terrified every time it shows up.
** ''Race to the Edge'' gives us [[spoiler: the Death Song, a dragon that lures other dragons in with its siren song and then imprisons them in hardening amber so it can easily devour them. If the pile of bones from its past victims isn't bad enough, we see it carry various dragons off to their doom ''on screen''.]]
*** [[spoiler: What's more, the Deathsong is STILL OUT THERE. Last we see of it, the gang sealed it in a cave, but Hiccup himself states that it might not hold. To add salt to the wound, it's likely that there's an entire SPECIES of it.]]
** Also in ''Race to the Edge'', the [[{{MacGuffin}} Dragon Eye]] that Hiccup finds initially releases gas that causes Tuffnut to go into a seizure. No one bats an eye, but anyone who has witnessed seizures would find it troubling to see.
* RescuedFromTheScrappyHeap: [[spoiler: Mildew]] has one after suffering a MyGodWhatHaveIDone moment. [[spoiler: Subverted when it is revealed he was working with Alvin the whole time.]]
* 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]]
* 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.
** Snotlout himself isn't well-liked in-universe, either, to the point the village ''cheered'' when they thought he died in battle in "Cast Out, Part 1".
*** [[FridgeBrilliance Of course]] considering they are [[ProudWarriorRace Vikings]], they probably just figured he died heroically.
* 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.
* TakeThatScrappy: Whenever Mildew or Snotlout get abused or suffer LaserGuidedKarma.
* UglyCute: Dragons, as usual. Particular mention goes to Meatlug the Gronckle, Fishlegs's placid and spectacularly ugly GentleGiant of a mount.
* ViewerGenderConfusion:
** In-Universe example. Gobber decides to re-name a baby girl "Magnus" because he thinks it looks more like a boy.
** Snotlout also has trouble telling which of the twins is supposed to be the girl sometimes. Not to mention many viewers keep confusing who is named Ruffnut and who is Tuffnut. Ruffnut even gets her hair cut, which would have helped clear the confusion up, but it is back to normal by the next episode.
** Dagur and his men can't tell the difference between Ruffnut and Tuffnut either.
* TheWoobie: Heather, in Season Three, almost becoming a WoobieDestroyerOfWorlds.
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