These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Yu-Gi-Oh! ZEXAL
Americans Hate Tingle: The series itself. While it is often looked down upon and berated for not being as "epic" as 5D's, it actually has better ratings in Japan than 5D's did.
Angst? What Angst?: Despite all that has happened to Yuma, especially with Vector, but has yet to actually deal with the betrayal. Shark even points out that he shouldn't be so trusting considering what happened but Yuma just says that he can't change his trusting nature.
Anti-Climax Boss: For all that V was hyped, he didn't turn out all that impressive in his duel with Kaito. Although part of the problem is how he spent the entire thing acting as Mr. Exposition, his strategy boiled down to tanking behind Dyson Sphere's ability to negate all attacks hurled at it, then direct attacking with its effect to bypass Kaito's Galaxy-Eyes Photon Dragon. Effective, yes, but not on the level of nail-biting what will happen next sort of suspense that his brothers' duels had. Kaitojust sohappened to have a perfect combo to summon Neo Galaxy-Eyes and win. V had no counter for it despite having seen the same card defeat both of his brothers in their Tag Duel against Yuma and Kaito.
Ass Pull: As per Yu-Gi-Oh! tradition, being the main protagonist means Yuma is entitled to as many of these as the plot demands. It's a specifically mentioned power when he's in ZeXal form, Shining Draw, which allows him to create completely new cards out of thin air. ZEXAL II takes it a step further allows Yuma to completely change a card in his hand.
Broken Base: While Zexal is pretty popular in Japan, the fans who receive the dub are divided over whether it's the worst series in the franchise or not.
Designated Villain: In episodes 37 and 38, Droite and Gauche plan to punish Tokunosuke for scamming the other contestants of their Heart Pieces only for Yuma to duel the both of them in order to save Tokunosuke. Despite Droite and Gauche having a perfectly good reason to do this, not to mention that Tokunosuke more than deserves whatever punishment they would give him, we're still expected to root for Yuma to save the slimy cheater?
Being banished from Heartland for life? Kind of Disproportionate Retribution, wouldn't you say? Besides, Tokunosuke still got his at the end, courtesy of all the people he conned.
Draco in Leather Pants: Mostly averted with Vector(whose fans seem to be fine with his sadistic manipulative personality) but played straight for Don Thousand in fandom with an attempt to "justify" his action as necessary to protect Barian World.
Family-Unfriendly Aesop: The fate of the world hangs in the balance? The big bad who's just flat out better at dueling than you about to beat you? Just almost literally pull a card out of your ass. That's right, Yuma cheats when he does the Shining Draw, he actually creates the cards. Now one could argue that Kaito creating Number 62 or even Neo Galaxy-Eyes that it's the same thing, but it's not, those are in the Extra Deck while Yuma could just be putting cards in his sleeve and putting them on the top of his deck.
Growing the Beard: The Duel Carnival arc features more intense duels with less reliance on Xyz summoning, and Yuma stands up very well on his own in a duel.
Alternatively, ZEXAL II is viewed a lot better by some, especially from episode 94 onward, though for the fans of the dueling, it ends up devolving into the Magic Poker Equation.
Hell Is That Noise: Kaito has a habit of whistling a quite eerie melody to announce his presence in a time-stop.
Magnificent Bastard: Vector. He's been behind most of the plot from the show's beginning, but Zexal II has him play near the entire main cast for saps for about 20 episodes as Rei, give no fucks when his plan to turn Astral evil backfires and creates Dark Zexal (he almost wins because of it, too), show his utter dedication to absolutely burying the main cast for beating him last season and eventually obtaining the Numbers in order to destroy the Astral World, and realise that using friendship against Yuma is most likely the best way to beat him. And even after all that, he's still a likeable villain because of the sheer respect you have to have for his dedication to his plans and his hammy, entertaining personality.
Memetic Molester: Jin, not helped by his insane stalkerish obsession with Kaito and his general appearance. Kaito himself went memetic on at least one forum after some of his... expressions in Episode 22.
IV is also starting to reach this point, mostly because of his obsession with "fanservice" and inflicting it on everybody he meets, whether they want it or not. Tron also raised a few eyebrows with his torture of Haruto in episodes 41-43, which he really seemed to be enjoying far more than he should.
Black Mist/No. 96 has definitely earned this reputation, thanks to him using his tentacles to restrain Yuma and Astral on separate occasions, laughing like a maniac, and his wide array of creepy facial expressions.
Memetic Mutation: I blew it on my bing! - A shoddy google translation of Yuma's catchphrase "Kattobingu" that went viral shortly afterwards.
Also tomatoes, thanks to the pre series special focusing on tomatoes and real life actors eating them.
"You just summoned your mom."
One of ZeXal's staff members makes posts about the series on his Twitter, and one of these went memetic for what the fans perceived to be Blatant Lies. The post in question?
98Zexal: Because I'm a person who hates useless things, I try hard to make sure that useless characters do not appear while constructing the story.
The bizarre faces made by some of the characters—particularly Kaito and IV—have earned a lot of mockery in fandom. Now we can add Shingetsu/Vector into the mix.
Speaking of Kaito and mockery, the fandom has long accepted that it's a question of not if, but when Kaito will scream Haruto's name in any given episode he's in. They then proceed to make fun of him for it every chance they get. Though not in ZEXAL II, given Haruto's absence.
A shot of Vector saluting in Episode 96 rapidly went memetic due to being the sum-up of The Reveal, creating what one forum dubbed 'Vectorbombs', namely inserting saluting Vector into just about any image.
Moral Event Horizon: Shark/Nasch crosses this when, during his duel with IV, he shows him videos of his friends dying during their duels, and then taunts IV into making him hate him. This is justified, however, as the intent was to make sure IV hates him, so he has no more connections with his old human life and so IV would stop trying to pull a I Know You Are In There Somewhere Fight.
Don Thousand crosses it straighter though, in order to ensure his revival, he traveled the world and selected seven humans who had connections to the Legendary Numbers, which had sealed most of his power. Not too bad right? Look at his methods for doing so. As an example, he brainwashed Alito's best friend and the ruling court to execute Alito, something that everyone had managed to notice, and just before Alito was executed, Don Thousand altered his memories to make it seem that he had been heartlessly killed, instead of being framed by a God of Evil. The end result was filling Alito with so much hatred, he was revived as a Barian. Then look at what happened to the other Emperors. Don Thousand essentially ruined their lives all to fuel his comeback, which also ended up tearing up nations and killing large numbers of innocents. Oh, and this includes being responsible from turning Vector of all people from a decent guy into the monster he is now.
Vector has finally crossed it in (as if he hadn't already) Episode 133. He heartlessly killed Durbe and Merag in order to increase his power, and during his duel with them, drained Nasch's energy as well. He didn't stop there though, once finding out from Don Thousand that Alito and Gilag were freed from his control, he quickly attacked Gilag after Alito sacrificed himself to save the former, and obtained both their power and Ponta as well. He laughs insanely throughout all of this, and declares himself to be a God quite gleefully.
Narm: Yuma's evil laugh in the dub, appearing in episode 20 and 61, definitely counts. Possibly intentional, given that it was false both times.
Nightmare Fuel: In the manga version, Yuma and his friends seemed to have no problem with eating what was left of Captain Corn. (Seriously, consider that for a minute...)
One-Scene Wonder: Semimaru, for being the only one of the Fearsome Four to be a legitimately terrifying villain. Even Mr. Heartland finds his methods over the top.
Astral in Dark ZEXAL mode, which is honestly creepy due to how extremely out of character it is for him, and would still be creepy by normal standards anyway.
Pandering to the Base: While the franchise is aimed at kids to begin with, the series seems to be deliberately appealing only to the younger kids for having a brighter, more childish art style, a protagonist who's much younger then the previous ones (and acts like it too), a general Lighter and Softer feel and having a quiz show explaining some of the most basic concepts of the game. Oddly enough, the series also featured many Callbacks to Yu-Gi-Oh!: Duel Monsters, which could be seen as pandering to the original fanbase.
Of course, following III's duel with Yuma, it goes into much darker content, potentially even deeper than 5D's...
The Scrappy: Yuma is the least liked protagonist so far due to his lack of duelling skill, hypocrisy, really stubborn nature and his screw ups take up unnecessarily large amounts of screen time. His dub voice definitely doesn't help his case.
Tokunosuke is also unpopular since he's a slimy cheat who was too easily forgiven and generally causes more harm than good to those around him.
Rei Shingetsu became one for many fans, due to his quick introduction, his annoying antics, his relationships with the other characters (especially Yuma) and the fact that he seemed completely irrelevant to the plot. UntilEpisode96camealong...
Kotori is also despised by a large number of the fanbase for being nothing butLoliconFanservice (which sometimes happens in episodes for no reason whatsoever) who does nothing but be The Load whose only lines in an episode are pretty much just shouting "Yuma!" over and over and over. It doesn't help her case that the fanbase think she's reaching Creator's Pet and Spotlight-Stealing Squad status due to her appearing in almost single episode despite contributing nothing but a Mandatory Line, being featured prominently in openings and endings for no reason but the aforementioned Fanservice, and having several merchandise centered around her when other more popular and likable characters hardly get featured. When compared to her predecessor Anzu Masaki/Tea Gardener from the original series, a lot of people actually prefer Anzu/Tea over Kotori despite having similar roles. She also does not duel outside of a single episode.
Though it should be noted that, in episode 97 she is the one to snap Yuma out of his angst and get him to get his crap together, then rally everyone to get out of the black hole they were flying towards. It's a pity that Yuma himself wasn't the main problem...
Viewer Gender Confusion: Astral is largely androgynous, so he can be mistaken for female if someone hasn't seen the series.
What Do You Mean, It's for Kids?: Thanks to many events in the series, especially in ZEXAL II, many fans have argued that ZEXAL is NOT a kid's show and get angry if someone states that it is one.
Events often cited as evidence that ZEXAL isn't a kid's show: Tron being an Abusive Parent towards his children, encouraging or forcing them to hurt or even kill to satisfy his goals, Vector's manipulation of Yuma and subsequent "Mind Rape", Dark/Black Mist/No. 96's tentacles, which have been used to bind both Yuma and Astral, as well as his general personality, especially after teaming up with Vector and episodes 101-102 which feature a story about a king who executed his people and committed suicide himself, complete with illustrations.
Then you have 103, where a gladiator is all but shown to have been executed via decapitation.
As of Arc 6, it is very clearly no longer a kid's show. Character deaths are being thrown around almost casually, with 17 characters—among them the Arclight Brothers, Durbe, Rio, Alito, Girag, Kaito, Vector, Mizael, Eliphas, and a number of Yuma's friends and allies from the past—getting killed off before the season even reaches the same amount of episodes. And now Kaito, as mentioned in the Tear Jerker section.
The Woobie: Baby Tragon. Poor critter's been used by Tokunosuke to presumably rig countless duels in his favor. Let's also not forget Baby Tragon is a Rank 1 Xyz Monster (lowest possible rank), has low ATK/DEF stats, and has an effect confined to only supporting allied Level 1 monsters (in other words, useless for the most part). Baby Tragon's card picture even features him having a very sad face. This story ends with a happy ending, though: Baby Tragon jumps up and flies around with joy when Yuma opts to befriend him and properly use him in the ongoing duel instead of abandoning/mistreating him like most other duelists. Yuma gets to keep him, too!
Most of the Barian Emperors qualify too, with the revealation that Don Thousand screwed up their pasts and made them Barians just because they happened to be connected to the Legendary Numbers. With Vector's true memories being revealed, he too is a Woobie, but a Jerkass Woobie (emphasis on Jerkass).
The manga's original characters include a few, namely in Hartland's three Theme Park mascots. All three are homunculi created from objects that developed some kind of will: Captain Corn was once a kernel of corn that had lodged in a pirate captain's compass, Thunder Spark from an Electron, and Princess Cologne from an abandoned doll. All three antagonize the heroes under threat of losing their human forms if they lose, which they all do. At least Cologne, the Woobiest of the three gets a happy ending courtesy of Yuma.