Shape counts more than size. Natural tends to be better than augmented.

These days a lot of men have their own breasts; I used to hear people joke that if men had their own breasts they would never leave home. It just isn't the same. I think shape is one of the biggest differences, when taken completely out of context. Although sometimes I really don't know just looking at the breasts if I am seeing a man or a woman. One time back when I was living in an apartment complex I was reaching out the window to fill a birdfeeder when I noticed that the top of the chest area of a person was in my direct line of sight. I even saw nipple and I still couldn't tell you if it was male or female. The shape was just too ambiguous.

And I agree that large breasts are not as much fun when the stomach sticks out farther than they do.