OK, finally someone said this well.  Except they called it a Usability Experience Specialist.  So, Mom, Dad, friends (shucks, potential clients ... this is what we do for a living!

And it seems to be a "best" career ... I'm not sure yet what that means.

Best Careers 2009: Usability Experience Specialist - US News and World Report

Notable quote: "Whatever you call them, their job is to help ensure that products, especially technical ones, are easy and pleasurable to use. How?"