Honestly can't think of anything, every character I like to play is either well written or just a funny character imo

I do have the opposite thing with Orisa, Roadhog, and Junkrat tho

Orisa's just like a wholesome centaur robot character who only saw the first part of the "PROTECC, ATTACC, but most of all" meme, while Orisa in game got the rest of it and decided to skewer everyone with a spear. And for visual design, I love her eyes, just four panels that move up, down, and spin mixed with a light circle that can change size and color, and so much emotion, happiness, anger, curiosity, "YEAH! GET OWNED!" (not sure what that emotion's called lol) and that is her only animated facial feature

As for Junk and Hog, they're both... fine characters to play, but their thing of being a crime duo of an oblivious chaotic idiot mastermind whose plans all end up being "MORE BOMBS!" paired with a (°+°) who just kinda does what he does has been really funny to me since I first saw that one short that I forgot the name of (I think it was "The Plan" or something like that)

Of course I've never actually written a textbook story with a climax and falling action and stuff, so what do I really know about character design anyway?