I haven't noticed a correlation between flirting and the kind of humor that is compatible to my own sense of humor, but again, it might be there. For me, however, one of the issues I actually actively look for when meeting a new person and considering a relationship with them is whether or not they are inclined to flirt. If someone flirts with me, it is generally a detractor and both she and I are probably better off not pursuing anything further, again except possibly for short term sexual interests. If someone else cares a lot about flirting (perhaps legitimately) that is usually a signal that I am not a good match for them. It would be the same if our first conversations focused heavily on NASCAR or high-end fashion... these are signs of a mismatch with my own personality and flirting is among them (though of course not the most telling or severe sign).