I don't understand the question. When you say "trans girl" do you mean a girl dressing and acting like a boy, or a boy dressing and acting like a girl?
Furthermore, pre-op, or post-op?
With that said... If it was a boy that dressed and acted like a girl, then... if they were cute, and I liked them. Even if they decided to eventually go post-op then it would be okay. But since I'm bi and kinda have a thing for futanari anyways, it'd be kinda neat pre-op too I think.
For a girl that dresses and acts like a boy though... I just don't think I could get into that. Not pre-op or post-op. If I'm going to date a girl, I like feminine girly girls... I wouldn't date a butch manly girl.
A-Anyways! With all of that said... I wouldn't necessarily go out looking for a transgender person to date, but... if the stars aligned and it just so happened to be, then... then well, what I said above then.