I say all of them, I just don't care what size boobs the girl I want to date has , that is because to me and many other men find all boob sizes are all equally sexy, because boobs are boobs. I want to date a girl for her personality , not her body. I want to date a girl that has the following: big heart, mature, kind, polite, and has an amazing personality. All that matters is in the inside not the outside (this can apply to both genders).
I'm more af an ass and thigh man but my ideal boob size would probaly be in the b-c range anything bigger and there's a chance that they'll be saggy, which isn't that big of a deal but I've always been a quality over quantity guy