Well I replied earlier saying I was a "boy's girl", but I want to write in a bit more detail.
I just tend to have/have had male friends/aquaintances and I've had boyfriends even though I'm bi... so I'm just not used to hanging out with/talking to/dating or whatever girls. I'm a tomboy anyway, so I feel that might be why I get on with guys. I don't dislike women, I would have no problem being with girls if I got the chance, but I just don't really. Last time I had female friends was when I was at school (although I had a g/f at age 15 but since then only kissed a girl maybe once or twice, last time being 2007 I think). Although, as a tomboy, I think I would get on better with more of a tomboy than a really "girly" girl.
However, my boyfriend says he gets on better with women. So we're similiar in that we get on with the opposite gender. It can be hard as we can get jealous too, and we're both bi (we're so alike even though we can also be different). He likes tomboys though, like I do.
Really though, it's about the person, not the gender.