No, that would not like you bi... i guess one thing is whether you like trans women pre op or post op based solely on their physiological appearance. By that I mean, not looking inside and seeing who a person is based on their outside characteristics. If one like trans women because they have a penis (not to be rude) then yes one would be bi; as it would still be based on male sexuality. But, if on likes a trans women because they are female on the inside, then no, one would be straight... That is my opinion. But then LGB and straight sexual orientations are fluid concepts. They aren't worth much, as they continually evolve over one's lifetime. The point is, who cares what one prefers consensually as long as one is themselves.