I guess it depends on how and where you grew up. I am from LA, and lived in major cities all my life, minus during my tour overseas in the middle of Nowhere, Bavaria. About 15 years ago, I moved to the most rural county in MA, and live in a city / town with maybe 12,000 people, few sidewalks, few street lights, and surrounded by agriculture. To this day, I miss some aspects of the city. Oddly, the sounds of traffic all night is much more comforting than that quiet you get in the country. The never-ending hum of freeways late at night is a sound I also miss, from where I grew up in a suburb of LA. It is just more normal as a soundtrack to life.
But, I love where I live now. However, everytime I go to Boston or NY City, though, I miss it again. Meeting buddies at 2 AM for pizza, the MBTA (subway) instead of having to own a car, things like that. One of the prime things I dont miss growing up in Studio City is how they would regularly find decapitated corpses in the dumpsters a few miles from where I lived.
Dane