I would too, except that TV AUs are pretty much invariably revealed to be inferior to the show's universe of reference, so if they ever did have an AU genderswapped Dean, I'm thinking we'd see her cocky attitude or some other personality trait in common with "our" Dean would get her into serious trouble - probably fatally within the episode, and it would be meant to be a Lesson for "our" Dean and/or Sam. I guess I just feel like SPN has no problem with carving stuff for the intended edification of its main protagonists on the bodies of women and black men and queer people. (I fired up "Sex and Violence" the other day because I thought the levels of fail were lower for that episode, which was ironically true given that it was the evil stripper episode, but on the other hand the siren's shapeshifting meant that the element of queerness in the text was basically inextricably linked to Evil. Well, other than an unhealthy, uncommunicative attachment to your brother, but I guess the homoerotic subtext really got away from the writers there, bwah!)