I'd identified as a gay man for several years (still do publicly, not out as trans yet). I've always been attracted to men, from the time I hit puberty. I never felt nor feel anything physical for women, nor was I interested in a romantic relationship with one. As I've begun to transition, pre-medically that is, I still want to be with a man, but as a woman. I haven't been very interested in dating a man for quite some time, and now I'm phasing into womanhood, I would love to date one, but being their girlfriend rather than boyfriend. It's somewhat foreign to say that I'm not a gay man, but a straight woman, yet this is how I feel. I've actually always identified more with female culture/characteristics, and never felt very connected to gay culture or other gay men as friends.
Who knows, though, this could change. Nothing needs to be set in stone 😉