Interesting thread this! The whole 'tranny and gay' thing has only recently appeared within our culture. I don't know why this conundrum suddenly started to appear in the last forty years or so. It seems that, although we kid ourselves that we are now all 'liberated' and open about our sexualities we are actually more inhibited than we were back in the victorian era!
Until we became 'modern' sex with same genders and/or transgenders was just what it was, fun and sex.
We need a 'bi-sensual' revival and ditch the old 'bisexual' chestnut. That causes nowt but grief.
As for me? I find trannies sexy as hell, so much so that I became one myself!
Nah, seriously, I feel that if you find trannies attractive, then enjoy it, don't worry about sexual orientation obstacles.