* AlternativeCharacterInterpretation:
** Kirito ''isn't'' as ObliviousToLove as he appears; he figured out that Lizbeth had feelings for him. In the case of Asuna, he ''does'' have feelings for her, and he recognizes the signals she's sending out, but he's still getting over the trauma of Sachi's death.
** There's also an in-universe example with Kirito, whose "loner" attitude is interpreted early by many players as a sign of him being a "Beater" and not caring about other players, while in reality it is caused by his SurvivorGuilt and fear of losing any more people; if anything, the way he treated Klein and Asuna (he is the one because of whom they started [[TakingALevelInBadass Taking Levels In Badass]]) and him taking the blame for other beta-testers after the first boss' defeat make it really hard to see him as a selfish type unless this trope is invoked.
** Keita blaming Kirito [[spoiler:for their guild-mate's deaths is in fact a mental defense mechanism for his SurvivorsGuilt. In truth, he blames himself for not being there. Yet he doesn't even believe himself, which is why he kills himself right afterward.]]
* AssPull: One of the biggest critiques towards the first two story arcs is that both end with a FinalBattle that is resolved by a blatant DeusExMachina. To elaborate:
** ''Aincrad'': [[spoiler: Kirito looses all of his HP fighting Kayaba, but still he manages to delay his disintegration by sheer willpower just long enough to return the favor]].
** ''Fairy Dance'': [[spoiler:Kayaba's consciousness appears out of nowhere to Kirito and gives him administrator rights to the game's system, which allows him to defeat Sugou]].
* AwesomeMusic: The soundtrack in general is very well done, but that was to be expected of Music/YukiKajiura.
** The first OP theme [[http://www.jpopsuki.tv/video/LiSA---Crossing-Field/0e570fe8601337c51c0e46d9beb1f2bf "crossing field"]] (performed by [=LiSA=]), and the first ED [[https://soundcloud.com/keiyr/yume-sekai "Yume Sekai"]] (performed by Asuna's voice actress, HarukaTomatsu).
** The second OP [[http://www.youtube.com/watch?v=hAJM3DatBJY "INNOCENCE"]] (performed by Eir Aoi) and the second ED [[http://www.youtube.com/watch?v=CpDyF4pkbAs "Overfly"]] (performed by Luna Haruna) might just top the first OP and ED in terms of awesomeness.
** In the actual OST, special mention to [[http://www.youtube.com/watch?v=H6NzqWI4HYU "swordland"]], which sounds in the most climatic action moments. It became the most iconic theme of the series, by far.
** [[http://www.youtube.com/watch?v=mGZPf-Y80Q0 "Luminous sword"]], Asuna's combat theme. This is a classic Kajiura-style theme that fits the main female lead to a T.
** [[http://www.youtube.com/watch?v=xsr26YV8t2M "False king"]]. Yeah, yeah, make all the "[[MemeticMutation EPIC RAPE MUSIC!]]" jokes you want. That doesn't make this theme any less awesome! Plus, the theme has its chance to shine, free from the {{Squick}} factor, during [[spoiler:the scene where Kirito beats Sugou in real life]].
** The second season of Sword Art Online brings us some new music to the table, starting with the first OP [[http://www.youtube.com/watch?v=mTCESSzPZSw "IGNITE"]] (performed by Eir Aoi) and the first ED, [[http://www.jpopsuki.tv/video/Haruna-Luna---Startear/bb40b5e9f9b656581c256c3704233771 "Startear"]] (performed by Luna Haruna).
* BrokenBase: Any of these can spark [[InternetBackdraft heated discussions]]:
** Is the Anime rushed and did it fail to develop its characters effectively as a result? Or is it fine the way it is?
** Is the novel superior to the anime? [[TheyChangedItNowItSucks Are the novel fans just upset that the animation crew didn't adapt the anime word-for-word to the novel's chronology?]]
** Everything about the OfficialCouple Kirito and Asuna. For Kirito it mostly has to do with whether or not he is a blatant MartyStu and bland WishFulfillment as opposed to being a completely legitimate and competent badass lead anime hasn't seen in years. Asuna is either the most moe and likable character in recent anime history or a MarySue and another typical ShanaClone. Some claim that both are a little bit too perfect, thus making them unrelatable, if not downright unlikable.
*** How Kirito and Asuna work as a couple have similar reactions. Some see it as a cute, incredibly heartwarming classic romance between two truly likable characters with genuine chemistry, which is the true central pillar of the story. Others see it as a saccharine, melodramatic and non-believable couple, created by a teenager who writes how ''he thinks'' relationships work, which's only there for even more WishFulfillment (See RomanticPlotTumor below).
*** On the same note, is Kirito and Asuna's RomanceArc developed enough? Detractors usually consider Episode 8 the beginning of the arc, so they say it doesn't have nearly enough development to be believable that they fall in love. Kirito's interactions with his SupportingHarem before then don't help either. Defenders, on the other hand, consider that it actually starts in Episode 2, and that even if their relationship is not the A plot, their interactions and BelligerentSexualTension are enough build up for when the romance jumps to the forefront. The constant hints that they keep meeting off screen for months (NotADate included) also help.
*** And finally, is their relationship a blatant and saccharine RomanticPlotTumor that utterly [[TheyWastedAPerfectlyGoodPlot ruins the awesome premise of the story]]? Or does it actually add to it, giving it real emotional stakes and creates an incredibly compelling mix between action, adventure and romance that is so hard to find in anime?
*** Who deserves Kirito more? Asuna vs. his SupportingHarem. For some, the Kirito and Asuna relationship lacks chemistry and development, especially in the anime.
** Whether or not Kirito and Asuna [[spoiler:actually had sex]]. They do in the light novels (rather explicitly, in a scene some consider to be {{Squick}}y) but the anime is much vaguer.
** SAO as a whole is LoveItOrHateIt among the viewers.
** [[spoiler:The implementation of AttemptedRape on Asuna near the finale of the first season and later on Sinon in the end of the first half of the second season. Some viewers think the AttemptedRape scenes add [[RapeAsDrama a lot of drama to the series]]. Others saw the AttemptedRape scenes as either executed very poorly, used as a cheap shock value, devalues Asuna and Sinon as characters, or used as a fodder to make Kirito look good. Or, worst case scenario, [[UpToEleven all of the above]].]]
** The series has an AwesomeMusic entry for good reason... although some people may argue that it sounds a little bit too similar to Music/YukiKajiura's previous works. Others say that the compositions are great, but the best tracks (particularly ''[[http://www.youtube.com/watch?v=H6NzqWI4HYU swordland]]'') are so overused that they eventually get old.
** Creator/AniplexUSA owns the rights to the series. American otakus consider them the [[Creator/ElectronicArts EA]] of anime [[CrackIsCheaper for good reason.]]
** Quite a few fans have said that SAO is a good GatewaySeries to anime, however, many of its detractors have said otherwise and accused it of being heavy on "[[PanderingToTheBase Otaku pandering]]" and WishFulfillment. This was a point of contention by some fans on whether it should air on Creator/{{Toonami}} or not, due to the said block's status as a gateway drug to the medium. Ultimately, the block’s creators thought the negative aspects weren’t a big deal.
* CompleteMonster:
** Sugou, the BigBad of the Fairy Dance arc. [[spoiler:He imprisoned 300 SAO players, including Asuna, into a virtual prison, and conducted mind control experiments on them.]] And then if that wasn't enough, he intended to [[spoiler:rape Asuna in ALO, and then in the real world, while she's still comatose]]. And as the last straw, he tried to [[spoiler:murder Kirito]] in the real world.
-->'''Sugou:''' [[spoiler: "First, I'll take the purity of your heart, then the purity of your body."]]
** [=XaXa=] and Johnny Black from the ''GGO'' arc. A pair of Player Killers from ''SAO'', they decide, after escaping into the real world, that they need to keep on killing. [[spoiler:[=XaXa=] hijacks his mentally unstable brother's plan to create the ultimate gunslinger, arranging for opposing players to be poisoned in the real world, at the same time that their avatars are shot in the virtual world. Johnny is his ally in this, killing two of the four victims, and subsequently trying to kill Kirito and Asuna himself after [=XaXa=]'s imprisonment.]] This is without taking into account their plans to torture three opposing players to death during ''SAO''. A pair of reprehensible sadists, with the highest onscreen bodycount of any character in the series (except for Kayaba, of course, since most of their murders would have been impossible without Kayaba's death game), [=XaXa=] and Johnny are about as low as gamers can get.
* CriticalBacklash: Not surprisingly, an increasing amount of folks are saying that the hate and backlash for the show and especially Fairy Dance is quickly reaching this territory. This is actually the opinion of Creator/{{Toonami}} themselves (whom probably witnessed first-hand many requests of SAO coming to the block get retracted when the show moved on to Fairy Dance during it's airing in Japan), as their [[http://toonami.tumblr.com/post/54263109126/do-you-have-any-concerns-about-the-incest-subplot-in rational for picking it up]] [[http://toonami.tumblr.com/post/54258600250/someone-is-gonna-ask-this-anyway-so-i-figured-i-get-it in response to the backlash.]]
* DesignatedHero: A MartyStu he might be, but Kirito is always sympathetic enough to avoid falling into this role... until the climax of the Fairy Dance arc. He's [[spoiler:given himself GM powers]]! He's about to save Asuna! He's got the villain at his mercy! And what's the first thing he does? [[spoiler:''"Set Pain Absorber at level zero."'']] That's right, folks. Kirito [[spoiler:'''brutally tortures''']] Sugou until he's wailing in terror and agony, doing such things as [[spoiler:''cutting off his arm and [[EyeScream stabbing him in the eye.]]'']] He's clearly suffered serious damage from it, as shown in the next episode when he [[spoiler:encounters Kirito in the hospital parking lot.]] The show interprets this action as ''heroic''; Asuna and Yui don't even look remotely disturbed by Kirito's brutal actions. Even if the victim is a CompleteMonster, the show looks like it's endorsing [[spoiler:torture and violence]] as instruments of justice, a message that can be just plain ''disturbing.'' Fortunately, Kirito steps back into sympathetic territory by the next episode, when he [[spoiler:refrains from killing Sugou and leaves him to the police instead.]]
* DryDocking: The number of fans that hate Kirito's guts and want him to stay away from ANY female character in the cast so they can have them for themselves is quite high, if we pay attention to the comments about the two tie-in games for PSP and PSVita (see TheScrappy entry about Kirito below).
* EarWorm: See AwesomeMusic.
* EnsembleDarkhorse: Really, all of the secondary female characters have rather big followings, [[FanPreferredCouple who would rather see them paired with Kirito instead of Asuna]].
** On a related note, there's a small number of people who strongly dislike the show but actually really like Lisbeth.
*** Silica as well, a lot of fans are upset that she doesn't get much screen time in the anime across from Episode 4 and her first episode cameo.
** Godfrey, [[spoiler: who is killed off after 4 minutes of screentime]] is this. His bro-ness personality and appearance reminds viewers of another EnsembleDarkhorse: [[FateZero Rider]].
** Klein is a HUGE example. He's one of the most likeable characters in the series because he acts like such a bro to Kirito, yet also shows genuine emotion and is a damn good fighter and guild leader. There's a large amount of fan's who claim HE should be the main character, not Kirito.
* EscapistCharacter: Kirito and Asuna, for people who don't consider them a [[MartyStu pair]] [[MarySue of Sues]] (or consider them, but don't mind or think it's [[JustifiedTrope justified]]). Although the number of people in this camp decreases dramatically in later arcs, specially the [=ALFheim=] storyline.
* FandomRivalry: Theres has been one with ''LightNovel/LogHorizon'', due to the similar premise. Interestingly enough, many ''LightNovel/LogHorizon'' supporters seem to be former [=SAO=] fans that dropped the series at some point (normally when the focus of the Aincrad arc shifted to romance, or when the Fairy Dance arc started).
** To a lesser extent, there's also one with ''LightNovel/AccelWorld'', which is written by the same author.
** ''Manga/{{Berserk}}'' fans have also not taken well to the fact that "The Black Swordsman" is now more commonly associated with a 16 year old instead of an adult.
** ''DotHack'' fans too are pretty pissed about the fact that SAO is considered super original and "had to be done", when in fact, .hack was conceived much earlier.
* FirstInstallmentWins: Despite the story spanning at least four different MMOs, with the titular Sword Art Online only appearing in in a single novel and a handful of short stories, the majority of merchandise and and promotional material use the characters' Aincrad appearance.
* FridgeBrilliance: "That's not possible!" said three or four times should probably give you a clue that we don't know something, especially if Kayaba says it about anything anyone does inside SAO. And then we learn about Fluctlight...
* FunnyAneurysmMoment: It's really hard to laugh when Kirito accidentally grabs Asuna's right breast after [[spoiler: seeing Asuna nearly getting raped much later]].
** Shinichi's occasional creepiness trying to win Suguha's heart is funny because he's harmless. [[spoiler:Kyouji, on the other hand, turns creepy right before he tries to rape and murder Sinon. Before this, the two were very similar.]]
* GodModeSue: There are some complaints that Kirito is this at various points, with some people who agree, some who disagree, and some who agree but think it makes perfect sense in-universe, so they don't care. Invoked during the ALO arc, as Kirito gets gets an OldSaveBonus from SAO ([[spoiler:because ALO was built using the same engine as SAO]]), so he keeps all his old stats, meaning that he is easily the most powerful player in the game the second he starts. Kirito even lampshades it.
-->'''Kirito:''' "I'm not even a beater this time, I'm just a cheater."
* HilariousInHindsight: The fact that there is an Arc called, "Mother's Rosario." Kirito's birthday is the Feast of the Rosary.
** The titular sword arts, as described in the novel, are special attacks where the system briefly takes over limb control, activated by specific arm movements. In other words, waggle controls five years before the Wii popularized them.
* HoYay: Oodles between Kirito and Klein, starting in the very first episode. In the Japanese version of the first episode...
-->'''Klein:''' Kirito! ...Ah... Hey, Kirito. You were actually pretty cute. That's my type.
-->'''Kirito:''' And that unkempt face of yours suits you ten times better.
* LoveItOrHateIt: One of the biggest anime examples in recent memory. Depending on who you ask, it's either one of the best animes of all time or one of the worst examples of bad writing in existence. And when these two kinds of viewers collide, [[InternetBackdraft it ain't pretty]].
* MemeticMutation:
** "GLOP GLOP" and "two years of semen" thanks to Chapter 16.5.
*** Or just mentioning "Chapter 16.5" as a shorthand/euphemism for "sex scene".
*** What makes this funnier is that the voice actors themselves love bringing this up!
** Some people felt that the death scenes of certain characters were massively forced and failed to evoke any feelings. This led to the creation of [[http://www.youtube.com/watch?v=Nms3eZGEb3w this hilarious video.]]
** [[http://www.youtube.com/watch?v=Nms3eZGEb3w SAO]], [[http://www.youtube.com/watch?v=daFzKBvxCtU crawling]] [[http://www.youtube.com/watch?v=HB2bvCEjQBU all]] [[http://www.youtube.com/watch?v=CMU8IaQ-QjY the]] [[http://www.youtube.com/watch?v=RNV0REo9TMc time]].
** [[VisualNovel/{{Tsukihime}} Isn't it]] [[Memes/{{Nasuverse}} sad,]] [[IncrediblyLamePun Sachi?]]
** [[http://www.youtube.com/watch?v=dx7xeNU6a9c EPIC RAPE MUSIC]]
*** [[http://www.youtube.com/watch?v=zkbHS3U9lJM Kayaba!]]
** [[{{Mondegreen}} COFFEE, SODA, TOFFEE, PASTA]], [[http://www.youtube.com/watch?v=DROMho7oa6I COFFEE, SODA, GIVE ME COFFEE]]
** Season 2's second episode has sparked off [[https://www.youtube.com/watch?v=1A5mM9j54zA plenty]] [[https://www.youtube.com/watch?v=y8C9U1flOZs of]] [[https://www.youtube.com/watch?v=iidFUNfh43k parodies]] [[https://www.youtube.com/watch?v=64H-1KbtUVc of]] [[https://www.youtube.com/watch?v=QPHZmD-yubA the]] typical MLG FPS montage, complete with dubstep, Snoop Dogg, gamer slang, product placement, and [=FaZe=] clan plastered all over the screen.
** [[http://www.youtube.com/watch?v=CzG77A5o3VE "Kirito]], [[LukeIAmYourFather I am your father!!!"]] [[labelnote:explanation]]Kirito's [[WritingAroundTrademarks "photon sword"]], him having the SuperSenses and SuperReflexes of a Jedi Master, and [[DarthVaderClone Death Gun's appearance]] [[VaderBreath and voice]] have led to many jokes about the second season being "Franchise/StarWars Online."[[/labelnote]]
** [[RocketPower "It's the same ending as last time!"]] -reaction to [[spoiler: The climax of the Phantom Bullet Arc being Kirito cutting up the villain in virtual reality and then getting into hand-to-hand combat with a rapist in the real world, just like the Fairy Dance climax.]]
* MoralEventHorizon: Virtually anything Kayaba Akihiko [[spoiler:a.k.a Heathcliff]] does, such as trapping 10,000 innocent people inside a game for '''TWO YEARS''', over which time 4000 of these people died, just to [[ForTheEvulz satisfy his game master fantasies]]. Even worse, [[spoiler:he positions himself as the leader of the strongest guild in the game, earning the trust and admiration of many of the people he trapped, with the full intention of betraying them once they neared the end of the game]]. Kirito even thinks that the guy is a monster [[spoiler:during their fight]], after seeing how he felt nothing in spite of being responsible for thousands of deaths.
** Sugou crossed the line early on, and continues to KickTheDog after that.
** Most of the members of Laughing Coffin probably crossed this in when they killed players in SAO, even though they knew they would die. However, [=XaXa=] and Johnny Black definitely manage to cross this [[spoiler: by creating the legend of Death Gun just so they could continue to kill.]]
* NeverLiveItDown: The series definitely has SupportingHarem elements to it, but if you were to believe the haters, Kirito spends at least 50% of his screen time picking up chicks without even trying, or worse, being a pimp. The reality is that this particular aspect of the series doesn't have nearly that much of a relevance outside a couple of filler episodes and one or two scenes where it's PlayedForLaughs. There are also several examples of female characters that don't show any hint of attraction towards Kirito, like Yoruko.
** It doesn't help the fact that [[WordOfGod Reki Kawahara]] likes to joke about this, like when he said that he feels incapable to write a female character in this series without making her fall for Kirito.
** On a similar note, Asuna's {{Tsundere}} traits. Albeit they're definitely there, they are prominent only between episodes 5 and 8. However, a lot of viewers talk about her as if she was [[Manga/LoveHina anime!Naru Narusegawa 2.0]]. To be fair, she got some problems in the adaptation due to her CharacterizationMarchesOn in the light novels (see her entry in the Character page for details).
** Chapter 16.5. An infamous exercise in IkeaErotica that was only posted on the original website's now-defunct ''fanfic'' section. The way some are quick to bring it up at the mere ''mention'' of the series, you'd think it made for the entirety of the franchise.
* NoYay: Anything from Sugou/Oberon.
* ParanoiaFuel: The thought of [[AndIMustScream being trapped in the new video game]] you just purchased and dying because you died in said video game. You'll be playing [=MMOs=] gingerly for awhile.
** And there is always the possibility that when DeepImmersionGaming is invented in a decade or two that it won't be as safe as it was intended to be. There are a bunch of ways to die with a Nerve Gear that DON'T involve product tampering. The fact that you're completely paralyzed means that if there was some emergency, such as a fire, you would be completely helpless because you'd have no way of knowing that you were in danger.
* PortmanteauCoupleName: [=KiriAsu=] or [=Kirisuna=] (Kirito x Asuna)
* RomanticPlotTumor: Kirito and Asuna. Their relationship practically overtakes the whole ''escaping the MMORPG'' storyline, even though it barely has any development.
** Suguha's feelings for Kirito/Kazuto in the second half. Getting past the [[KissingCousins Incestual]] ValuesDissonance, it can come across as unnecessary and only serves to drag the plot down. Specially considering that the audience already knows that, even if they weren't related, there's no way in hell Kirito would have chosen Suguha over Asuna after all they went through together in Aincrad.
* TheScrappy: [[BrokenBase Everyone in SAO]] [[InternetBackdraft gets bashed at some point]].
** Yui gets the most heat, to the point that some believe that she is a lolicon [[PanderingToTheBase pandering]] bait, the dreaded moeblob. Many disliked her story arc, as they asserted that the emotion was contrived and pretentious.
** Kirito has gotten more and more hate from the fan base with the pass of time, as his ability to make girls to fall in love with him reached almost memetic levels, despite that it's arguably overtly exaggerated (see NeverLiveItDown above). To give you an idea, the anime has two tie-in games for PSP and PSVita, and there are quite some fans that say they are interested, but won't play them because they don't want to play as Kirito.
** To a lesser degree, Asuna also gets on the nerves of some fans, especially because of her {{Tsundere}} traits. Curiously enough, her DistressBall during the ''Fairy Dance'' arc isn't brought up nearly as often. Haters use it more against the writing as a whole, rather than against the character itself.
** Ironically, there wasn't the same reaction with Silica in Episode 4 where [[spoiler: she was seen in her fanservice underwear]].
** Suguha was almost INSTANTLY disliked by people for almost everything she did from her wanting to be KissingCousins with Kirito, to her genuine lack of combat skills in a MMO, to her repeatedly going [[BrokenRecord "Kirito]][[MostAnnoyingSound -kun"]] in just about every scene she's in, to even her "stealing" the role of the heroine from Asuna.
** Sugou. The reasons why are described in the CompleteMonster section.
*** He is also a ReplacementScrappy for Akihiko Kayaba, not being nearly as cool or magnificent as he was.
* {{Scrub}}: An in-universe example, any players with an attitude against Beta testers mentioned they saw them as unpunished cheaters who have an unfair advantage in terms of knowledge and getting a head-start can give off this vibe.
* SeasonalRot: Quite a few fans consider the Fairy Dance arc as a down part of the series, especially since it pretty much nullified Aincrad’s [[TearJerker/SwordArtOnline emotional]] conclusion. [[spoiler:Asuna was reduced to a DamselInDistress, and the romantic aspects were focused on Suguha and her feelings for Kazuto/Kirito. When Episode 21 hit, the arrival of TentacleRope had the fanbase screaming and Episode 24's AttemptedRape of Asuna in front of Kirito sent most who had stuck with the show until that point nuclear.]] As a result, quite a few people that have previously praised SAO have switched to bashing the series by the arc's end. In fact, it's quite common to hear the phrase: "I like Aincrad, but hate Alfheim." as a way to basically describe people's viewpoints on the series.
** Interestingly enough, this is also applies to some people for the second half of the Aincrad arc, mainly Episode 8/9-14. For these people, the two year TimeSkip and the switch of focus from the "complete the game" story to Kirito and Asuna's relationship was what started the decline.
** SecondSeasonDownfall: There was concerns that due to the backlash of Fairy Dance, the Phantom Bullet arc onwards wouldn't be realized. Fortunately, this was averted as a second season came out in the summer of 2014. Whether Phantom Bullet will eventually be dubbed and air on Toonami is still up in the air, however.
* SnarkBait: By the time the second season started, SAO had become one of the biggest ones in the entire anime community. Specially among critics. Some even said that they enjoyed seeing how the first season failed to meet its potential. The Fairy Dance Arc gets the majority of the flak, albeit the Aincrad arc doesn't get a complete free pass either.
* {{Squick}}: The [[spoiler:AttemptedRape]] on Asuna. The act itself was already bad enough to {{Squick}} a lot of fans, even to the point of making them to drop the show. But it's even worse in how it's portrayed: [[spoiler:The way Kirito saves her is seen by many as an ''empowerment fantasy''. Even people who don't mind the WishFulfillment aspects of the show think that Kawahara went way too far in that scene.]]
** Mind you, Sugou was squicking the audience ''since his very first appearance''. Just the way that he sniffed Asuna's hair in the hospital with that sick smirk on his face is enough proof that his CompleteMonster label was never meant to be a surprise reveal.
** Some people had a similar reaction at the end of the ''Phantom Bullet'' arc when [[spoiler:Kyouji tries to rape Shino]]. To be fair, this time the scene is much shorter and ''much less'' graphic than the one from ''Fairy Dance''. But still, the fact that Kawahara tried to pull off the same stunt ''again'' without changing significantly his writing didn't sit well at all for many viewers.
* TastesLikeDiabetes: Yui. Fans thought that she was adorable and contributed to Kirito and Asuna's relationship. Detractors on the other hand saw it as contrived and pretentious and say it contributed to the show's SeasonalRot.
** Debatable sure, but some of Kirito and Asuna's scenes where they are being a couple can really come across this way due to some rather cheesy, if not just down right cringe worthy lines.
* TheyWastedAPerfectlyGoodCharacter: Klein is introduced in the first episode as a new player who Kirito somewhat befriends. The two separate by the end but instead of making use of Klein by having him possibly a {{Foil}} to Kirito (Mainly because Kirito fails to save the first guild he joined, Klein protected his whole guild through SAO), and him being a active ally in the series, instead Klein serves mainly a comic real character with not much characterization beyond being "Kirito's buddy".
* TheyWastedAPerfectlyGoodPlot: The first three episodes deal with an interesting premise, thousands of players trapped in an online death game by a madman. Then the plot chomps forward with Kirito friend-zoning multiple teenage girls and falling in love. Then there's a little sister who's attracted to her big brother, and a copy cat death game and... ugh. To put it simply, it's not as self-contained as the premise would imply.
** Similarly Kirito at one point mentions how life for everyone in the game is starting to be the norm and people don't mind it as much. Instead of using this to show the deep immersion of the game through Kirito and Asuna in a discussion or something, it's just used as throw away idea.
** Kayaba Akihiko's reasoning for why he trapped the players in SAO was never explored and why he did the things he did is never fully gone into detail besides him basically saying "I did it cause I could", which wouldn't be a bad reasoning, if it wasn't for the fact that he hints at other reasons.
* ValuesDissonance: Shino Asada [[spoiler:attacked a bank robber who was about to shoot her mother, and manages to kill the full-grown man ''[[GunStruggle with his own gun]]'' - years before the events of GGO, in which she was ''sixteen''. In America, that CrowningMomentOfAwesome would make her a hero of nation-wide acclaim, but this is ''Japan'', where guns are considered more horrible than child pornography (NotHyperbole). She is ostracized by just about everyone, including '''''[[UngratefulBastard her own mother.]]''''' This even extends to ''[[ThereAreNoTherapists therapists]]'' who learned of the event, so she has a case of PTSD so intense that a schoolyard bully can set off a panic attack simply by ''pointing a finger at her and saying "bang".'']]
* WhatAnIdiot: Sugou's ego and CardCarryingVillain -ness makes him quite GenreBlind and he made many mistakes that were entirely avoidable had he just coldly thought and calculated about it like Kayaba. Sugou could have kept up a facade to everyone, not just Asuna's parents, or in general just not talk and gloat. Or he could've used a private server for testing instead of wanting to play god. Or he could've used something other than keypad and card for lock. Or he could've used GM ban/delete as soon as things went downhill. If he had down any of these, he would've got away with everything. But he didn't, and this led to Kirito rescuing Asuna and Sugou in jail.
* TheWoobie:
** Asuna reveals to be one, having no-one else but Kirito in her life. And beyond that, [[spoiler: was one of three hundred unfortunate players who never woke up after the SAO ordeal, being forced to be with Sugou, then proceeds to be nearly raped by him.]] Someone help this poor girl out!
*** Her backstory is expanded in later novels and the manga, which reveal that [[spoiler: the reason why she's alone in the world before knowing Kirito is because of her high class family, who was extremely strict and put almost unrealistic expectations on her. Especially her mother, who originally comes from a low class family, and started to live through her. It is implied that the reason she entered the game was to escape from all that pressure.]]
** Kirito isn't much better. Although he woke up, he discovers that his love never woke up, still comatose, only to find out that [[spoiler: it had been planned.]]
*** And before that, the emotional pain he went through after [[spoiler: Sachi, his previous love before Asuna, dies]].
** Sinon has PTSD from killing an armed robber in self-defense. [[KidsAreCruel She was bullied by nearly all her classmates because of this.]] [[ThereAreNoTherapists Her therapists reinforced her PTSD instead of treating it.]] Thieves have learned to exploit her PTSD to extort money from her. [[AllMenArePerverts She's constantly being sexually harassed.]] [[spoiler:Then, the only friend she's had for years tries to rape and murder her.]]
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