The one time I went to NYC I went to see the Statue of Liberty and Ellis Island that was like 13 yrs ago. Id go back in a heartbeat to see Ellis Island again it was amazing to see.
The only thing I would go and visit in NYC is Coney Island to ride the Cyclone roller coaster, that is, during the operating season. I was there quite a few years ago for this very reason and the Cyclone is awesome, if you are a roller coaster fan. Other than that, I have no interest in NYC. I may go see the WTC site as well.