Geographical area. You should not assume that geography determines personality or lifestyle. New Englanders are not all thrifty and tight-lipped; people in “red states” may hold liberal views; midwesterners are not always polite. Be careful not to make simplistic assumptions.
Check also that you use geographical terms accurately.
america, american Although many people use these words to refer to the United States alone, such usage will not necessarily be acceptable to people from Canada, Mexico, and Central or South America.
british, english Use British to refer to the island of Great Britain, which includes England, Scotland, and Wales, or to the United Kingdom of Great Britain and Northern Ireland. In general, do not use English for these broader senses.
arab This term refers only to people of Arabic-speaking descent. Note that Iran is not an Arab nation; its people speak Farsi, not Arabic. Note also that Arab is not synonymous with Muslim or Moslem (a believer in Islam). Most (but not all) Arabs are Muslim, but many Muslims (those in Pakistan, for example) are not Arab.