>On the negative side, though, I did feel that New Yorkers (and by this point in my life, Americans in general) could be hard to get close to - easy to approach, but hard to connect with.

I have found this to be true, especially after living in Germany and finding somewhat the opposite: people are hard to approach, but once you get to know them, you connect with them on a much deeper level than I ever did with people in the US. But of course, these generalizations certainly don't apply to all Americans/Germans.