Depends on your personal preference. That's like saying, "What is the best flavor of ice cream?" You are going to get different answers from people. Me, personally, I like exaggerated hourglass curves best. Like this:
http://www.mexicanlust.com/home.htm Other folks will say she's too thick, or even fat. Some would even say she's too small, and I love those guys b/c they practically sign my paychecks, lol.