All three, actually. A woman can be very slender but with large hooters, boingg... Then again she could have small breasts but if an outstanding ass, boinggg...or maybe not necessarily outstanding tits or ass but nicely porportioned or even athletic "gams" and boinggg....
My preferred look for women in porn is usually totally nude or some kind of brief top with bare legs, bottoms, and feet. Don't like boots (yuck), not too fond of heels (except those near nude kinds with open toes and no back to em), nor hose (excepting fishnets). Prefer the shaven clean as a whistle look.