I tend to prefer the smaller breasts (A to B), though at times I do like larger breasts (C-D). It really depends on the girl. I think the shape and firmness are actually more important than the size. I would prefer small, perky breasts over large, sagging ones. BTW, yes I have seen small, floppy breasts and large, firm ones and in that case prefer the latter. Breasts that are TOO large or obviously fake are actually turn-offs for me.