i don't know if most guys have that much of a preference or not , it sort of also depends what the style is at the moment as being thin can one day be trendy the next not . I've seen this happen a few times over the years .
Being slim and trim myself, I prefer being with women who are similarly inclined. I think this holds true for most men, but certainly not all. In fact, some h/w proportionate men prefer women who are morbidly obese, and fairly layered with drooping, sagging flesh, however, most of these live in Massachusetts.