The quality of life is the key.
I mean, you will still need to get up every moring to go to work, get the kids to school, pay the bills etc, etc, etc no matter where you live. (unless you are independently wealthy, and if so what the hell are you doing living here!) It's the quality of life when you are not working etc that will mean the most I think. Good weather, relaxed pace certainly do contribute to feeling good.
Friends of mine who live in Australia have often said that over there people don't live to work like they seem to here, they work to live. The brits still work on average much longer hours than any other european country. We just don't seem to be able to get the balance right. And a money grabbing, greedy government won't help.
The next question is; where to go?