I'm not a huge fan of women who flirt with everyone, having a relationship with them is a lot like being another face in the crowd. Nothing is special and no one is sacred. If I'm in a relationship, I like to develop a code or a secret language, so that I can flirt and no one can tell.
I don't have a real clear picture as to what we are calling flirting. In my experience its next to impossible to flirt online, I always get misread or misunderstood, so I tend not to bother. The exception I suppose would be saying the obvious, like what we all did in the show some love thread. If that qualifies as flirting then I suppose I'm a bit of a flirt. (Sorry Zero)
In person I tend to flirt with women by making fun of them and arguing with them, not even really trying to win. Or pushing them into some bushes or the ocean. I like spontaneously putting them on my shoulders. Or if we're running, 'finding the puddle' but, I suppose thats more of a relationship type flirting.