Mostly

 I tend to think that I have a pretty good gaydar. I only really mess up if I'm attracted to the person. If I'm attracted to the person I tend to think they're gay although it's more wishful thinking, lol. Other than that my gaydar tends to be pretty on the spot. I think it's easier for gay people to have gaydar, they know what to watch for. I guess that's why most (not all) straight people have really crappy gaydar.