Aside from the standard "puppet mouth" used in anime, the animation styles are all somewhat different. SAO is A-1 pictures, which specializes in fluid animation and bright colors. DBZ was produced by Toei, which is known for producing "retro" anime that have a classic animation style to it. MHA is produced by Studio Bones, which specializes bright colors and character designs that "pop". The problem here is that you're assuming that all animation in anime is exactly the same when the differences in animation are noticable.
And out of those, you listed many shonen (action) shows. All of them are action shows, actually. Within your list, the trope list per show has a few similarities, but there are differences that you should probably give some credit to. For example: Attack on Titan is VERY gritty and is popular among adults due to the in-depth, complex story that is present within the show. On the other hand, shows like DBZ and MHA are aimed at younger teens with far more comedic and/or straightforward storylines. Not to mention that there are plenty of other genres in anime, as
osby
said. Potentially the best anime of all time; Fullmetal Alchemist: Brotherhood is basically a mixture of steampunk action and also drama. Clannad is one of the most well-known romance anime out there, and it's second half is notably well-received to the point where the first half is over-shadowed, even if part 1 is decent too. There are other genres like sitcom (Lucky Star) or horror/thriller (Higurashi), but the bottom line is that you should probably open up your mind more and not generalize so much. It's inaccurate.