@Tamaru:
I'm gay, but I enjoy bisexual and even straight (M/F) porn quite a lot, albeit mostly homemade stuff for the latter. That's because there's a different sexual dynamic to all 3 of these. The way a straight guy behaves with a girl is different to how a gay guy behaves with another guy, or how a bi guy might behave with a guy and a girl. As a gay man, in all of these situations, I'm still enjoying the guy(s).
Tottally agree with above, plus the guys on straight porn are also hot. I find some of the guys on Hotguysfuck really hot. I love the scenes where the guys fuck and the condoms break and they continue fucking till they realize it. Those scenes are very rare to find though.