There are none about the U.S. that [b]aren鈥檛[/b] derogatory. At least none of the popular stereotypes. Reportedly we鈥檙e all fat and bigoted. And when we鈥檙e not [b]shooting[/b] each other, we鈥檙e in church. 馃え
Canadian satirist Rick Mercer traveled down to Arkansas some years back to ask some good folks about Canada's efforts to protect their national capitol building from the effects of global warming. A former Governor offers his congratulations on the efforts to preserve their "National Igloo".
You don't want derogatory national stereotypes, but the whole notion of a stereotype is derogatory. Check your dictionary. The word "oversimplified" is part of the definition of the word "stereotype." All stereotypes have a negative connotation because they're applied to people or things for which they are clearly false.
Avoid stereotyping the people of a nation. The practice is pejorative in nature.