Male, very straight. I don't add the 'very' to be in any way defensive, I do believe that sexuality is a spectrum and wherever the hell you fall along that spectrum is fine by me. I happen to be right at the straight end though.
I guess the ironic thing is that I'm a pretty damn poor specimen of traditional male heterosexuality, and I've been mistaken for gay on quite a few occasions, partially because I'm quite well-spoken (yeah, I know, it doesn't make sense to me either, but apparently that's the link some people make, the number of people who have said I sound gay is surprisingly high), and partially because I'm pretty useless when it comes to women. But, alas, it is to women that I am attracted.