I have always been proud of being different... in a bunch of other ways, but I hid my gender identity anyway due to negative experiences with others deciding that being ok with being different in other ways is being a "special snowflake" and attention seeking. They would just see it as another way Mayo's trying to be different and special and demand attention. So once puberty hit and people started enforcing gender, I just went with "dumpy former tomboy" for a public identity because trying to be an "androgyne" seemed like an untenable position and being FTM just didn't feel RIGHT. If I'm going to feel wrong about my gender on either side, I thought, I may as well stay with what I've got. At least as a female they'll just be socially cruel that I'm too masculine. If I were a dude, I'd get beat for being too feminine.
Being andro, and having only low level dysphoria with my body, and even less with language ("she" me all you want, as long as you don't explicitly state "You're a woman.") I always felt that my identity was somehow LESS valid than being MTF of FTM. I felt like I would be appropriating the realm of non-cisness and taking something that wasn't mine to partake in if I were to be open about being FTA.
I didn't decide to be open about it until encouraged to do so by a close friend who's going MTF. I'm still mostly invisible, and haven't bothered to make a thing about it at work or with my family, but it's nice to be able to be open about it with my friends. I'm not in the closet about it anymore... but I don't mention it unless asked for the most part.
8^)