I dont really have a preference, but I like small, really tight fit bodies(no "j-lo" ass for me).
and generally these bodies have small breasts, plus the girls with big breast(natural) usually end up fat and their breasts hang down to their waist anyways.
I like nicely shaped breasts, regardless of size. As a matter of fact, the larger they are, the more likely they are saggy and poorly shaped. And all fake breasts are poorly shaped. But I'm more of an ass man anyway.