I've spent more of my adult life traveling the US working then I have here.
most of the "gung hoe" types were in the DFW area btw. also the place with the most courpt building inspectors too.( trust me , thats really saying something) atleast in reguards to what we were doing. which was industrial coatings. after the 5 monts I spent in the SFW area, it left a real bad tase in my mouth from texas. Lets just say, the second we were out of texas, the owner and myself made a bunch of calls to several diffrent federal agencys. intrestingly enough a short while after there were several high profile arests made. You might have read about them... illegal dumping, cutting corners blah blah blah...
Houston was a little better, but not much.
over all, the nicest people were in the south( true south, not the boarder areas) the rudest was the upper eastern coast. the most racist was the midwest. Test best "american dinner" food was the northwest.