From the 2 years I spent there, I can tell you this:
Type 1: Well-meaning, kind person. Sometimes a bit *too* nice, to the point that it looks condescendent. Certainly not stupid, but not exactly well-read either.
Type 2: Super-intelligent person who has read like a trillion books throughout their life, and knows at least enough about practically any subject.
Type 3: Ned Flanders.
Type 4: Super-patriotic southerner. Probably a NASCAR-loving, beer-drinking, gas-station worker. Shuns anything foreign and is adamant in his belief that the US is the only country in the planet. Always "Supports The Troops", but doesn't question the war. Has a wife, 3 kids and a labrador retriever.
Type 5: Overweight, blue-collar worker, possibly living off your tax money. Believes all Russians are Communists, all Vietnamese are Vietcong, all Mexicans ride donkeys to work, and all Iraqis are terrorists and Muslim extremists.
Type 6: Take any character from the main cast of Beverly Hills 90210 and copy-paste them into real life.