Males and Females

4, curvy asses are the finest. A women who has their shapes to max (really curvy hips, half big but not fat ass, fine shape on their breast) always turns me on.

For example:
Women-with-Curves.jpg
 
5 I suppose, but I'm much more a tit man than an ass man, and thus have insufficient data.

OT, but I've noticed as I've gotten older, I have learned to appreciate smaller tits more.

The most important thing is symmetry (besides face). Big boobs and skinny body is bad, just like no boobs and fat body is bad.