Many friends have said to me that they love New York now in a way they never did before, and their love, I've noticed, takes for its object all the things that used to exasperate them--the curious combination of freedom, self-made fences, and paralyzing preoccupation that the city provides.
I don't know what the author means when he says "curious combination of freedom, self-made fences, and paralyzing preoccupation that the city provides." After he finishes all that, he talks about how his daughter loves bump into her imaginary friend. You can click on the link to see the later part.
link of source: http://www2.newton.k12.ma.us/~Joseph_Golding/FOV1-00043828/FOV1-00046D02/FOV1-0005AEAF/Bumping%20into%20Mr%20Ravioli.doc