This is an exciting new topic!!! :surprise: Never ever before was this discussed here. I'll mark this day in my calendar. From now on, every year on this day I'll do nothing but stare at tits all day!
But seriously, assuming we're talking about female breasts, I don't have any preferences. I do like a nice shape though. I don't like huge, saggy tits with areolas as big as saucers. Other than that I don't care whether they are real or fake, a-cup or double ds.
What I kinda do like, but it's not a must, are nipples you could poke your eyes out with.