I agree w/ SirPoonga.
Most games seem to require either exploding things, killing things, and/or collecting things. Women, it seems, do not require as much violence as it appears men do and they are usually not as competitive on such a small scale (I mean, really, how many of us guys consistently day-dreamed of holding the high score at the local pizza place?). The less violent games seem to be more popular across gender lines, as SirPoonga mentioned above.
Given that, here's a funny little story about me trying to get my girl into FPS games, namely Unreal Tournament:
I've been playing FPS games since the release of DOOM. I remember first seeing it run on a friends top of the line 486. I dreamt about playing it for weeks until I could save enough money to afford my own system (Yes, Doom actually prompted me to get a better job to save more money). Even then, my girl accepted my passion for gaming.
She enjoyed watching the bloody frag-fests, but never seemed interested in playing, so I never bothered her about it. *snicker* More time for me to play!
Oh, to carve up your best bud with a chainsaw, all the while imagining his pathetic screams on the other end of the connection. It was pure joy. At one point, my best friend and I both had two phone lines. We'd dial-up connect to play doom, then call each other with the second phone line, just to curse at each other. (This was high-tech for us back then)
Most of my gaming buddies have sinced moved away and the frag-fests have dwindled. One day recently I was set on getting the girlfriend to at least try to learn Unreal Tournament, then we'd go from there. With no small amount of insistence and loads of encouragement, I setup a local LAN game (I have TWO computers now, my past self would never have imagined) and get ready to show her the ropes.
I hit the space bar and *zap* into the arena, where I sit eagerly awaiting her entrance. We're not going to fight this time, just a tutorial. She *zaps* in and enters a virtual world I have longed to show her for at least a decade.
As I begin rambling off the various funtions of UT weaponry and debating the finer points of circle-strafing, she darts quickly in my direction, in that funny ice-capades way that UT characters seem to move. I stop talking as she stands there, pixelated face filling up the screen. As I wait for her to whip out a rocket launcher, point the greasy barrel deep into my chest and blast my gibs to kingdom come, she calls out from across the room,
"How do we hug?"
....
I have not asked her to join me in a shoot-em-up since.