I'm with FinallyMichelle, that the poll needs an option for "They are okay, but I wouldn't say no to more."
After a year on HRT, I finally made it to an A. My rib cage and shoulders aren't outrageously broad, so my boobs don't look totally implausible. They are much bigger than those of a good female friend of ours. So, if an A is all I can do, then I'll be fine with that. But I was kinda hoping for a B. A B was what I wore when I was CD-ing, and it looked good.