Warning, personal sexy-time paragraph below:
My wife has stated many times that if by the time we're done having kids she does not have double-d breasts, she wants breast augmentation to get them. She currently rests at what I consider a respectable C cup. I personally think a good handful is fine, though we're both in bondage (LONG before that 50 Shades garbage, so don't bother asking about it) and she wants them large enough to rope up, which C cups aren't unless you use very fine, uncomfortable rope.
This might be a touch TMI, but given what I've seen in this thread, I'm assuming not.
Forgive a personal paragraph, have a booby picture: