Just throwing a few things out there: definitely need to keep "attitude" important. Maybe we need something to reflect overall experience... this suggests "potential (for improvement)" and (I'm going to get flamed for this by some of the crusty mongers) "personality," etc. Occasionally a provider can charm you with a great attitude or sense of playfulness and can give you a great time beyond the pluggin... Attitude kind of works in these ways.
Also, sometimes a girl can be beautiful but not very sexy, or plain looking but with a definite sexuality, smoldering effect: so something to reflect that overall quality of sexiness. "Bone-abilty"?