Lack of different art styles????? Berserk, Blade of the Immortal, Vampire Hunter D, House of Five Leaves, Pluto, Evangelion, GetBackers, Jojo's Bizarre Adventure, Vagabond, Hellsing, Houshin Engi, Legal Drug, Basilisk, there are TONS of styles that vary.
Usually I'm one to take the piss out of my own sub-cultures due to their conceit, but I will also NOT tolerate borderline bigotry against them. Moviebob once said that otaku shouldn't act like they're animation experts just because they're into anime. Well here's me modifying that statement. If you're going to criticize anime, at LEAST READ SOME STUFF BEYOND SHOUNEN JUMP!!!! There's more stuff out there than One Piece, Naruto, and Bleach (all having spiralled downhill fittingly enough)