Some days I feel like a nut, some days I don't . . . (pun intended)
In every instance, I'm still always already me. ID doesn't change, presentation changes. ONE person though, I don't move back and forth between "femme" and "macho" -- or whatever.
Let's be clear here. I don't "disguise" myself as female. I don't "pass" as female -- not to any degree I'm aware of, although I realize that some small children can't figure out my gender.
Physically I'm cis-M . . . stuck with it. Wish I weren't. Not enough surgical steel and hormones in the world to transcend me into the female I aspire to.
Some days I'm inclined to stress the "F" presentation. Some days I don't press the presentation and that results in "cis-M" -- but mostly on the edge of the uni-sex, ambiguous boundary. The Harley Hog regalia, full leathers, black, is pretty "M" -- but I know a fair number of butch lesbian women who wear the same riding gear.
We're not broken. We don't need surgery, hormones, and coaching to be who we are. Culture is catching up. There is less and less strict, formal boundary between one gender presentation and another.
Presentation is one issue.
The issue about who you are physiologically -- genitals, hormones, etc . . . That's a complex set of parameters. I wish I were born female. But for me, realistically at 67, "transition" through surgery and hormones is not going to afford me the changes in myself that I seek.
I am who I've been all my life. Radical medical intervention is not going to change who I am.