I guess I've come to see trans as a medical condition and I know from working with the disability community that while you may have to self advocate, you don't have to be the activist and you DON'T have to disclose your disability to people if you don't want to!
Trans ought to be treated like any other medical condition. It's not, because of this lingering hangover from delusions-of-godhood Neo-Freudian trained psychiatric professionals during the middle of the 20th century who had everybody, MDs included, convinced that innate gender (or "subconscious sex") is completely malleable, especially in childhood. Well, funny story, it's not; it's not even psychological, it's neurological. Sad trombone.
I think about what the deaf community has had to go through over the last two hundred years. Or people suffering from degenerative diseases like MS. Fighting paternalism, the medical establishment, and public misperception of their condition. That goes on to this day. Now for us, add the cultural-social baggage over belonging to a sexual minority.
I've identified as queer for a long time. I don't mind being trans and I'm feeling kind of weird about passing for cis. I don't want to be a straight white male ... think of the assumptions people will make about me then. I'm also an activist in my day to day life so I definitely intend to continue my activism on trans issues. It's important to me. I want the world to change. I feel odd about the choice to be stealth, like my whole life up to this point didn't matter? I can't really lie about who I am. Made a decision years ago not to and have been lucky enough to get employed and stay employed anyway.
I really admire and look up to trans activists like Patrick Califia-Rice and Kate Bornstein. Patrick Califia-Rice was well known as an activist and writer well before the transition.
I'm a nerd. I'm modifying my body. That's really sci-fi. (All my friends were nerds and not jocks in high school, so why change now?)
But Thomas, this is a personal question only you can answer. I have not yet gotten such rude questions as when I came out as gay in 1997, maybe I will in the next few weeks, or maybe not. I treat it as a teachable moment instead of the horrible insult it is. Nobody wants to be explaining their status constantly and I think in your case when you are on T and confident enough to pass that it's really only people who know you who will ask such intrusive questions. People on the subway didn't know I was gay (despite my best efforts re: horrible haircuts).
I go back to disability community. Some people with certain disabilities or disease incorporate that into their identity. Other people forcefully do not. I have autism. I know people with autism who call themselves autists because they feel like they are a different tribe from neurotypicals. I take a different attitude. I am a person with autism. I actually don't think we're that different and I don't want my autism to define me. We are lucky to live in a modern society where we can define our own social identities. HTH.