One thing about New Yorkers that visitors from Washington tend to notice right away is a frankness about sexuality that much of the country lacks. A friend who has lived in New York since the seventies tells me that that frankness has been toned down since the seventies, but it is still there. In D.C., by contrast, no matter what happens on the back porch of the leather bar, we observe the polite fiction that we are all asexual and that the goddess has assigned us our sexual orientations solely as a social statement.
My friend also mentioned an aspect of growing up in New York, namely, exposure to viewpoint diversity. Such diversity has traditionally been anathema in D.C., although we see more of it as a more diverse crowd moves into the capital.