What are people's major interests when it comes to the butt?

As in; roundness vs. realistic, thick/chubby vs. thin, bubble vs. heart-shaped, I see a lot of just absolutely out of proportion hips that I could only describe as a bouncing health problem... Like the whole chest Zeppelins issue (oversized breasts) and lately I've started mostly seeing people drawing butts like two big ass circles, no pun intended..., With a serious decline in more shapely or well sculpted asses... For the most part excluding males.

so I'd like to ask other people's opinions on this. What do you like to see in an ass.