that's what I do!
I like my body without prosthetics. It makes me feel more naturally feminine. I like to dress for my body, and celebrate my body as it is. And also the thought of someone undressing me and finding 'fake' body parts throws me off. I used to wear a stuffed bra every time I dressed up, but when I became more at peace with my identity as transgender, it became super important to me to embrace my body without that.
I am taking herbal supplements and do regular massages with oils which actually has spurned some kind of development. My breasts are definitely more pillowy now.
Also I recently purchased a noogleberry breast enlargement system with which to pump them up and hopefully get some more tissue growth! My goal is A cup (maybe B-ish, but I'm not going to ask for too much!), and bigger, more sensitive nipples. I hope to at least transform my chest to look softer and more feminine, so that if you look at it you would think it was just a flat chested woman!
But in general I adore smaller breasts, and plenty of supermodels are also super flat!