Their MySpace and Facebook status updates generally mention the fact that they are watching someone else play a video game, as even though they claim to be gamers, they usually spend more time watching their boyfriend/male friends play than actually playing. When they do play, they usually only play casual multiplayer games that allow them ample opportunity to flirt with the men that they are playing against (they also usually either let the man win, or suck so much they didn't have a chance anyway). When they do like a video game, it's generally because they find one of the male characters to be "hot."
They don't necessarily play only Nintendo systems. Their console of choice generally is based on what system the men in their lives are playing. These girls are the reason that actual female gamers get a bad reputation in the gaming community, and they're behavior should not be encouraged.