Well, it seems I may be the first to answer who is completely comfortable with both sides of my gender. In fact, if I could have the power to shapeshift, I would alternate between my male and female forms depending on my mood and/or situation. There are times when I am perfectly comfortable in my "man skin" and other times when I prefer to be Elise.
I'm in my mid fifties and I've been a closet cross dresser for about 45 years. When I was younger I wished I was a girl, but there weren't a lot of transgendered resources back then, so I never considered transitioning as an option. As a young teen, I felt that if I wanted to dress like a girl, then I must be gay. So I tried experimenting with a gay friend and quickly found that wasn't the answer. Still liking to dress, but definitely being attracted to women, I used to always joke that I was a lesbian trapped in a man's body. (That joke kind of turned on me though when my first wife had an affair with a woman [who is now her wife]).
Anyway, I consider myself a realist. I know that I can't go back in time and be reborn as a female. And even if I could, it would mean I would lose my children. I fully recognize that because of my physical size and features, I could never be "passable". And because I have family and a professional reputation that I must protect from the narrow minded majority out there, I could never dare come out of the closet. So, I really have no option but to remain a closet cross dresser.
And I'm really okay with that. Being Elise let's me escape from reality for a little while and become a kinder, gentler, version of myself. I love the way I feel in women's clothes, and I enjoy trying to create the illusion of a pretty feminine version of myself. I often fantasize about being a real woman, but it's just that -- a fantasy. I then return to the reality I also love. The reality where I have loving children, grandchildren, brothers, sisters, parents, a career I love, etc.
And the male version of me comes in handy too. Just today I had to change the alternator in my car, and the bolt was so rusted that I needed every ounce of my 215 pound "man frame" to wrench it free. So having both of us around comes in handy!