Shape is most important for me in determining who is “fledge” worthy and who isn’t. But it isn’t the only factor. It’s levels to this here homey. And an ass that’s well rounded and plump, beats out an ass that’s small and defined in my book of fledge.
But that’s just my personal opinion.
Booty comes in many different shapes and sizes. Some woman have “surprise cheeks” when it doesn’t look like much being clothed. But if you’re lucky enough to see what’s underneath the clothing, it would definitely surprise you on how good it looks.