Great thread! I think it is an innate thing that is heavily related to how I identify with myself. How do I perceive myself when I am allowed to be myself. I certainly do not do guy things much on my own. I think sexuality plays a role. What roles do I enjoy the most during sex?
When it comes to deciding what to do about the whole situation, the analytical side seems to have the ability to both create and tear down barriers related to this.
Before I discovered that I was transgender, around 15 years ago, I thought that maybe I was gay. The problem with this was that I found myself much more attracted to woman than men and never thought about men. This had me thinking that I couldn't be gay, so I went on with my life thinking about how I could pursue a woman. Although this is true, sexually I almost exclusively prefer to play the role of a woman. With these facts in mind, where the heck could I fit in? The answer, which I learned at around 20, was that I was transgender, that I needed to find a female partner who understood this. Yes I had times where I tried to repress it and be a man, but this NEVER worked. At this point I began to experiment and seriously consider having a male partner. It became clear that I needed a partner who was mentally more masculine, somebody who would be attracted to me and would initiate intimacy. Eventually I decided I wanted to be with a woman who had this mindset.
Before puberty, things were not so obvious to me at all, but there was obviously something very different about me. For the most part, I just didn't fit in anywhere. It was hard for me to make friends with other boys, and girls seem repelled by me because I was a boy. I was also a very small with a bone structure that is strikingly female my entire life. If you combine this fact with how my brain worked, being masculine and pursuing females was basically impossible until I became much older. I've even had times where females pursued me, which totally confused and befuddled my emotions. Middle school and high school were a pain. Most of it was just not really fitting in anywhere. Eventually, in high school I made friends, and I began to barely fit in somewhere; however, I was repressing so much that I didn't feel my self. Instead, what I felt was that I was some form of result, a product of my environmental pressures. What happens is that you try very hard to be what the environment pressures you to be, unhappily without being able to reveal it. It sucks because I still have to experience this on a daily basis for the time being.
I like that you bring up MMO's because I definitely learned a lot about myself by playing female characters. It is pretty clear that there are different roles available in life, and that a person usually has a clear preference for one of those roles. In an MMO, you are given the freedom to choose what role to play and to experience it without any fear. I pretty much hated playing male characters and loved to make female characters. I always find it interesting that other people like the opposite or even maybe something inbetween. I'm glad that this is how it is because it means that everybody is different. It makes me happy to think that I could be very happy to play a cute female character while somebody else is very happy to play a character that I would be unhappy playing.