It really depends. I took an entire geography class back in college called "The South", and a big part of it was defining what exactly the south is. Some people would consider Texas and Florida to be parts of the south, but most do not. Florida and especially Texas, are part of their own thing. You're also right that its partially an urban versus rural thing, drivers in Atlanta or Charlotte can be very aggressive, but its nothing compared to trying to commute in Boston etc.