[T]here are some things I'm probably not willing to do to sell stories for a living. I won't pass myself off as Black, Korean, Vietnamese, or some other ethnic or "racial" type. [...] I'd pass myself off as a women writer to sell romances, except I haven't developed the touch to write romances yet [...]
I have two different reactions to this, one from the creative side and one from the business side.
From the creative side: Isn't pretending to be something we're not a major part of writing fiction? I'm a middle-class white male but I've written stories featuring both genders, multiple sexual orientations, various ethnicities, a variety of socio-economic classes, a wide variety of occupations, and on and on and on. Writing only stories populated by people like me would be pretty damned boring.
From the business side: I've never pretended to be anyone other than who I am when dealing with editors, but I've had work published with bylines that were not my own. There is a long history of female writers using male pseudonyms (especially for science fiction) and male writers using female pseudonyms (especially for romance). This is a marketing tactic that I readily embrace. If the difference between an acceptance and a rejection is my byline, then I'll change my byline.
How about you? What are you willing--or not willing--to do to sell a short story?