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: Fatal Fury
Adaptation Displacement: Terry's Cartwright Curse in the anime trilogy, bordering highly on Never Live It Down; when people think of his love life they often think of his dead love interests in the anime a lot more than Blue Mary, his perfectly alive one in the games. (Though the fact that SNK has been doing little Ship Tease between them, if any, in the The King of Fighters doesn't help.) While Fatal Fury: The Motion Picture was not a bad movie, things like this are one of the reasons why it's a shame that Fatal Fury 3 didn't get a animated adaptation. Of course, if Blue Mary was ever in a 90s Fatal Fury anime, it would get folks to wonder if that would've averted this once and for all or made thingsa whole lot worse.
Duck King, emphasis on both "crazy" and "awesome." Between the fact that he turned breakdancing into a physics-defying martial arts and the family of ducks—able to mimic his breakdancing moves perfectly—living in his hair, Duck King was this trope from the start. Also of note... I AM DUCK KING! QWACK! QWACK! QWACK! QWACK! QWACK! QWACK!
Kim Kaphwan, who debuted alongside Mai in 2. Fatal Fury 3 gives us Blue Mary and Yamazaki.
Rick Strowd. Some haven't taken kindly to the fact that Vanessa started cribbing off of him (thus lowering his chances of getting into KOF himself), especially when she used his Hellion special and Gaia's Breath P-Power in 2002. Ironically, Vanessa went on to become one of KOF's many darkhorses.
Li Xiangfei, the last of "The Newcomers" from Real Bout 2 also counts. She actually beat Rick out for a spot on the roster of KOF '99, and appeared in a few more titles after that (2001 and 2002: Unlimited Match), as well as Wild Ambition, a game where nearly all of the extra characters who weren't originally in the first Fatal Fury were fan favorites from the sequels.
At least half of the Garou cast. Rock Howard (who, as The Hero of Garou, is more of a meta example for the SNK fandom), Bonne Jenet, Gato, Hotaru, Tizoc, Khushnood Butt, the Kim brothers... In fact, the only thing that's stopping Rock from crossing into the main KOF titles? SNK Playmore is "saving" him for the sequel to Garou. Now how long has that title been a pipe dream? Just be thankful that he's made it into Capcom vs. SNK 2, the Maximum Impact titles, and Neo Geo Battle Coliseum. Likewise, interviews say that Butt is one of the most requested characters for the KOF lineup.
Speaking of Billy, due to a Flip Flop of God, many say that White is his half-brother.
Fountain of Memes: Terry. In fact, you'll be hard-pressed to find a meme that isn't about him saying something.
Good Bad Bugs: Aerial Canceling, where you could cancel a jump into a special move, was already known to the developers but left in the game because an SNK higher-up thought it made the fighting look more frantic. This technique would be tweaked a bit and appear as part of the mechanics in The King of Fighters.
He's Just Hiding: Kim was defeated by Freeman before the events of Garou and apparently goes missing. He shows up to berate his son Dong Hwan under certain circumstances, though.
Love to Hate: Geese has done terrible things over the course of the series but is beloved by the fandom (not unlike Rugal), cementing him as one of the premier SNK villains (and a more notable fighting game villain from the 90s in general). Geese can do no wrong because the fandom worships the ground he walks on. It doesn't hurt that he's charismatic, has a sense of style, and despite his wicked deeds, never quite crosses theMoral Event Horizon. Oh, and he's an uncontested badass.
Depending on the fandom, Terry and Joe also qualify.
Memetic Molester: Hotaru Futaba, thanks to one of her supers, Flying Queen of Chaos, wherein she kicks you upward, rides you to the ground and.... uh... seems to press your chest, draining your health and chi as she lets out a yell. Of course the animation makes it more look like she's RAPING you. Now it's hard to look at that move as anything OTHER than full-bore molestation. Not to mention Hotaru's animations after the chi burst resemble something akin to post-orgasm bliss.
The "OOOOOOOUUUUUUAAAAAAAAGH" sound Andy makes when you hit him. Not so prevalent here but it cropped up quite a bit in early KOF titles. It got ridiculous in '99 onward where for no apparent reason they made it his KO cry. You will hear this especially in 2002 and Unlimited Match, where he groans this practically every time you hit him.
Narm: Come on, the anime movies are full of this. From Terry's ridiculously exaggerated Heroic BSOD and resulting alcoholism because he lost ONE FIGHT in the second film, to the indescribably cheesy ending music in the third one.
Viewer Gender Confusion: Jin Chonshu. He looks like a little girl, but is actually male. To make it worse, in some of the games, he seems to be wearing lipstick and guyliner... Not to mention, Kappei Yamaguchi went nasal/high-pitched in voicing him to make it sound like a girl voicing him.
The Woobie: Hotaru. And in the anime, Lily... holy shit, Lily!
Woolseyism: Krauser's line "Blood is thick, but syrup is thicker. Think about it."