When I say New York, I'm not only referring to Manhattan...
  1. They greet people (warmly) in the morning.
  2. They allow people to cut in front of them while waiting in line.
  3. They wear winter clothes and accessories when it's not necessary.
  4. They clean up after their dogs.
  5. They don't litter.
  6. They tell taxi drivers "whichever way you think is the quickest."
  7. They look forward to taking a taxi.
  8. They've been to the Statue of Liberty or the top of the Empire State building.
  9. They refer to corner stores and delis as bodegas. @tothemaxxx
  10. They pronounce mozzarella, "matso-rella." @tothemaxxx
  11. They wait for the WALK before crossing the street.
    Suggested by @johnnyartpants