Another girl who plays games chiming in here...
A confession though. I haven't done much in the way of online gaming through my consoles. The prospect of playing with a random bunch of children, arseholes or just complete wingnuts does not appeal. I'd rather play network games with those I know. This might be a girl thing, or perhaps it's just me - my patience threshold with people who think "hurr hurr LOL fag" is a scathing putdown is terrifyingly low. If I were to venture into the jungle that is out there, yeah, I'd probably leave my microphone unplugged. If only so no-one can hear me yelling at the TV when I get ganked / execute someone with a perfect headshot (no-one likes to hear a lady gloat).
What I have done, however, is 5 years of hardcore raiding in EverQuest. I found the community there on the whole to be more adult, and geared towards encouraging teamwork, rather than people going off in search of solo glory leaving the rest of you high and dry. Perhaps it's because the audience is of a more mature age - I'm thirty-something now, and appreciate the banter that comes from playing with your peers. Fourteen year old humour doesn't really do it for me. Having said this, I came across quite a few youngsters in my years of playing EQ, and most of them were very nice.
In all the gaming situations though, I'd prefer to be thought of as a team mate, rather than "a girl". I've had a few weirdos try to give me free stuff in EQ, which had the opposite effect they were hoping for - I just got creeped out and wandered off. But even though my avatar was female, a lot of people assumed I was a bloke. It was only when we started using Vent regularly, that some members were surprised to find out their raid leader had boobs. And could still out-DPS them. Heh.
It always surprises me though how few girls seem to enjoy playing games. Any kind of games. It's just... not done. And I don't get it. I got hooked when there were only 16 colours available on screen and floppy disks were the size of plates. Why did none of the other girls at school see what I saw? While they were off talking about makeup and boys, I was in the computer room programming games in RM Basic. And they thought I was weird.
Why? There shouldn't be a stigma attached to gaming like that. Most girls I've met, if I start talking about how much I enjoyed Mass Effect, they'll look at me like I'm from another planet then start blathering about The X Factor. This is why I tend to hang out with men, for the most part.
Maybe I've just had rotten luck. I know there are girls who game out there, we just seem to be spread thinly...