I always preferred hanging out with guys, back when I enjoyed hanging out at all. At the time I thought it had something to do with guys just being naturally more direct, but now I think it has more to do with the fact that we were technocally from different (sub)cultures. They don't hold me to societal standards because I'm hanging out as a friend, not as a date, and they aren't girls so they don't know how to hang out with me in a way that forces stereotypical female traits on me in the same way girls do. I suspect it is vice versa for guys hanging out with girls. If you're a guy, your female friends can't force you to be a guy in the same way your male friends can.