Your current age.

Your current socio/economic/financial position in life.

Whether you are single or married.

If you have children or not.

Where exactly you live.

How much you really rely on things related in a city.

My statement was geared towards one's life over it's entire span, rather than being geared towards the current point we're each at in life... When I was younger, I greatly enjoyed living in the city despite all the expense and other issues like crime and close proximity to neighbors. As I grew older, a more quiet (suburban, but close enough to the city) life began to seduce me... Not saying it as concrete fact, but if you really talk to a wide range of people in older age, it's a recurring trend.