Threads like this are always an interesting read for me. I am bisexual. I enjoy sex with both men and women, have feelings for both, and I like to dress no matter which one I am in a relationship with. And you know what? I have met maybe 2 or 3 people outside the TG/CD community who don't marginalize it or get turned off by it, gay men included. Women and gay men want similar things- scruff and muscles and masculinity. Acting girly doesnt work well.
I also don't get to maintain my straightness, like some posters do, yet I doubt I would want to dress female if women were'nt attractive to me.
It's a conundrum whether you are LGBT or not, so straight guys, take heart.