First of all I am surprised by the amount of gay-themend threads in a videogame forum and I believe the topic has been discussed several times already without coming to any conclusion.
But... whatever.
As for myself I can say that I never felt attracted to women. Even as a child and before even knowing what sex is all about I could see that I feel about girls differently than other boys.
I strongly disbelief that people just become gay because of experiences in their life and I especially doubt that one can choose to be gay. Therefore I think the thread title is misleading as in my opinion it is not a matter of wanting to be gay, but rather a matter of being gay or not.
As I feel attracted to other men, and as I cannot imagine it being any other way, I want to be gay because I have always been like this.
Some time ago I actually would have liked to be straight, not because I felt women to be more attractive or anything, but just in order to be seen as "normal" and to avoid problems in day-to-day life. However I later realized that I am not the problem, but rather the other people who are having problems accepting me.
To make a long story short: I can say that I certainly not decide to be gay. It is just the way I am. And therefore I don't want it any other way.