Personally myself, I find bras to be beautiful things to wear, if you buy ones with pretty or elegant patterns on them. I enjoy adorning my body with them.
However, I have my reservations about the prospect of developing boobs when on HRT, as they seem like a pain-in-the-arse when it comes to day-to-day issues. And bra straps can be really irritating over long periods. So I may end up hating them I guess, despite how beautiful they can be and make you feel. Boobs and bras seem to be much fun to have and wear when your by yourself or with a lover, and a bloody nuisance at all other times.
For me - the prospect of developing boobs would be a sort of "necessary evil" in the pursuit of becoming more female, perhaps in the same way that the risk of male pattern baldness might be seen as a necessary evil in the pursuit of becoming male. You can't love everything about becoming your target gender I guess. Rough with the smooth and all that jazz.