My own preference is for small, but perfectly formed, with nipples that point slightly up. That’s the fantasy, in reality, I’ve never been with a girl with large boobs, or enhanced. There are occasions where I can really understand a woman wanting help, if her boobs are really drooping, and she feels very unhappy and insecure in herself, then anything that helps give her confidence in herself, and makes her happy, then fine, but getting big implants for pure ‘hey, boys, look at these!’ vanity, I’m not so sure about. They wouldn’t impress me.
Keira Knightley is a good example of a girl who’s flat-chested, but is totally at ease with herself, and that gives her a sexiness all of its own. She’s an example of the sort of girl I find attractive anyway.