Transgenders... The ultimate bisexual fantasy?

Transgenders... wanna know what you all think. I just had a hot, intense relationship with a tranny boy while abroad and for me it was a real turn on because I got the best of both worlds. Someone who is mentally male and yet also fully understands what it is to be a woman in this world. Not to mention the true expression of sexual roleplay involved and the fluidity of gender roles in general...