I just try to be gender neutral. No one ever asks my gender, they just assume I'm male, and I won't tell them otherwise. I used to list myself as female on my profiles, but after a couple REALLY creepy guys started contacting me I just decided to become an internet androgyne.
I like it better that way. I feel that when people think I'm a man, I might not get as much free stuff, but I get a little more respect.