The fact of the matter is, I can be attracted to any gender, really. I have been attracted to males and females, sometimes both at the same time. And I have been attracted to people who don't fit traditional notions of gender expression, such as "butch" lesbians and even very masculine straight women.
Anyway, I haven't been looking for anybody, but if someone captures my heart, I don't really care what gender that person might be, though I have a feeling she will be a very different sort of woman--or, perhaps, a trans man.
Whoever he or she is, as long as the relationship we have is love, I'll be happy, I think.