About the clothes thing.. My girlfriend's size A, and she complains about all the clothes being designed for women with bigger boobs. Often the clothes she buys are loose from the chest when they are perfect from other parts.
But about boobs in general.. I like to look at big tits, I think they are sexy, but so are smaller boobs. Like said above, smaller size looks good on some girls, bigger size on others. And in an SO the breast size doesn't really matter to me. I'm an ass man too..