Hm, I'm between "both" and "females" because, as with Arison, I find the female body more aesthetic. It's more to do with how it's evenly balanced in terms of top/bottom than anything else, which means better silhoettes (sp) and the like (as long as uberchest isn't present).
Also, because of societal influences, it's somewhat unavoidable that men and women will be imprinted with certain stereotypical forms and epitomes regarding beauty. For example, with "female beauty" a man can never completely attain or understand that and visa versa. This has more to do with upbringing than natural faculties IMO, but with feminism and all the talk of "equality", I think people have a tendency to overlook the role that cultural construction plays in defining and molding youth.
I prefer the female aesthetic.
In terms of face though, definitely "both". Anyone can look good with enough make-up and the correct camera angles. Besides, personality really does affect facial features, and I do believe that when someone is truly happy or together they can appear beautiful no matter how many eyes, zits, and whatnot the have.