Can I cheat and pick two cities? Seattle is my favorite city in the US. I have lots of relatives in that area, there are good restaurants, great scenery, and fun things to do and the climate isn't too extreme. Hobart, Tasmania, Australia is my other favorite city. I had a great time when we were there several years ago and would love to go back. Tasmania reminds me a lot of the Pacific northwest in the US, but is very different.

There are things I like about both living in a city and living in the countryside. Living in a city is more environmentally responsible in my opinion though so I live in a small city where everything I really need is within a few miles.