I can't wait to do that but I can't for a while due to my job. I travel international a LOT and spend a lot of time going into all sorts of places in Africa , china and about to go to Saudi Arabia... That would be fun with an F on my passport.
I'm not full time though and not out at work yet so it's best to keep the M on the passport for now. I have been on hrt for almost three years now and get some funny looks when they look at my PP photo and look at me then back and forth a few times... Lol. Last month when I came back into the US, they asked for another photo ID!!!! It was comical. :-)