New York is a great city. I have visited many many times. Have spent weeks there during single visits. The mass transportation system is awesome (except when the workers go on strike). You can find pretty much whatever you need. I love Manhattan. Yeah, like Dudesky said, people are not exactly friendly. I was used to that, however. That's how I grew up. I actually had a hard time adjusting to the friendliness in Northwest Arkansas when I got here a few years ago.
Lots of money are being made and spent there. The city is very fast-paced. Everyone has soemthing to do. Ray's pizza rules. Life within NYC, but outside of Manhattan (i.e., the other boroughs)is more laid back, but still a lot faster than most other places.
Oh yeah: learn how to parallel park if you intend to drive anywhere in NYC.