Something I really, really hate is when people say stuff like "Oh, I didn't know you were gay. You don't act gay"!
WTH is that supposed to mean? I've been told many times that it's hard to guess I'm gay, but would it really matter if people could guess anyway? Just because I'm a homosexual it defines every perk of my personality and body language. I've always hated that aspect.
Oh, also, a lot (not saying most because that's an unfair generalization) of gay guys I've been with/met have been so superficial. I mean, I love taking pride in my appearance and wearing fashionable clothes, but to judge people purely on the fact they're not perfect is gross. I tend to avoid most gay bars because of the bitchy atmosphere.