Well, based on this definition:
Vanity: Excessive pride in one's appearance, qualities, abilities, achievements, etc.; character or quality of being vain; conceit
I would have to say that I am not vain.
If, on the other hand, you mean to what extend does my physical appearance factor into my female gender identity expression, I'd say, a lot.
It frustrates me that I'm unable to achieve what I consider an acceptable feminine appearance. But, I keep trying.
Could it be the reason we pursue breast growth so fervently is that, psychologically, we feel that having large breasts makes up for not otherwise looking feminine?
Clara