I'd freak out. As nice as it is to dress/look like a boy, I think if I woke in the morning without boobies, and with something new in my underwear my first reaction would be to freak out. I have a strange sort of attachement to my anatomy, and as cool as it might be, I think having them taken away so abruptly would shock the hell out of me.
Now, if I woke up as a male every OTHER day (and could go back to being female the next day) I would be pleased as punch. I suppose I'm a little afriad of committment.:p