Horses for courses - I'm afraid I have no idea about dress sizes, so I'll give examples using known people.
I like Angelina Jolie sized/shaped women, although with smaller breasts, whereas a friend of mine likes his women biiig.
I've got a girl friend (i.e, a friend that just happens to be a girl) who likes Lisa Tarbuck because she's a "normal sized woman", but to me, Lisa Tarbuck is a bit of fat bird.
I guess there's nothing intrinsically wrong with her size, but she is far too big for my tastes.
As I say, horses for courses.