Nashville, TN. The urban sprawl, and poor city planning (narrow roads, interstates everywhere, etc.) make this city a ridiculous place for practical commuting/running errands. But then again, there are a lot of people riding bikes, so the drivers in my area at least during the warm weather (around a university, and a pretty well off neighborhood) don't mind our presence and are usually pretty friendly/patient.
by the way maddyfish, i'm surprised to see alexandria, Va in the "worst list" ... I never had to much of a problem when i lived there ... just goes to show that a good place for one might be hell for another.