Oh, and then the next day Rivers' boyfriend stumbles upon this thread~!
I'm male-identified and in a homosexual relationship. My MtF/DMAB sister identifies as a lesbian. Personally, I don't find it strange at all. Just like cisfolk, our sexuality and our physical (or mental, or emotional, or what-have-you) sex has no baring on our sexuality.
Heteronormative is an exciting word, and seems to apply to a distressingly vast number of situations.
Honestly, I seem to carry myself better identify better with other men when considering myself as a gay man, though my current formal sexuality identity is "pansexual". I guess "gay" just suits my current intense preference for the male form over the female form better. And it isn't like we've got much cultural/media representation for what a "pansexual" is, other than Jack Harkness of course.