I never had much of a problem with my lovely little boobs. I've been involved in dance from a very young age, and in that kind of environment, for ascetic and practical reasons, flat chestedness is without a doubt loved. In the rare times I'd be away from dance for long enough for the "real world" to have a bigger influance on me than "dance culture," there would be times I'd think, "Huh, my boobs are small. Maybe they'll grow. No biggie." When one of my friends said she was getting hers done when she turned 18, I was shocked. I could understand someone thinking "Wouldn't it be nice..." but cosmetic surgery seemed like such an extreme for something I considered just to be "nice." I was, I suppose you could say, ambivalent about the size of my breasts. I'd put up with so-called pithy comments from friends of all sizes, I'd be told I was a nice size for dance, it worked.
But then I began to grow up a little more, and became more aware of my body, thinking of it from a more sexual standpoint. I discovered I have beautiful breasts. The shape, the size that fits (if you know what I mean....), the symetricality. That's not arrogance: every woman should be able to say, "I have beautiful legs, or hips, or bum," just like there are other parts of my body that I don't consider as beautiful. It's nothing more than an opinion, but I'd say we should be comfortable in our own opinions. Of course, that doesn't discount other opinions... small chested girls take heart: a guy, in all seriousness, once called mine "amazing." It was a moment of victory for all of us, girls!