That's a good question. And I'm afraid I don't have a specific answer yet. In my mind, the place to live would have to meet as much of the following criteria as possible, knowing that no one spot will ever be able to meet all of them.
We live in a pretty temperate place. If we moved, the weather would have to be sunnier and warmer than it is here most of the year, and yet still be green. My wife has allergies and often suffers from anxiety, so somewhere that's brighter and a little drier would help.
COST OF LIVING
The place would have to be comparable or less than what we're paying here, or the opportunity to earn and sustain a higher cost of living would have to be far greater. I'd prefer a cheaper cost of living, since my earnings could be the same regardless of where we lived, if the work I had was done remotely.
I'd want to live where there were some rules and laws governing property use, but not so many that I couldn't build or improve it. Some laws are good, but too many can make things onerous, complicated and expensive.
A place where my wife and I could have friends. We've just never really fit in here. We have a lot of acquaintances, but not so many that we actually do anything with.
It would be great to live around family, or within reasonable flying distance.
THINGS TO DO
It would be nice to find things to do that were free or inexpensive, along with some higher ticket items. A greater variety of activities to choose from that didn't take hours to get to would be nice.
I'm not asking for much, am I? :) That's why I don't have a specific place to live yet. I don't think we're ready to go anywhere anyway, so I still have some time to look and figure out what place might meet a lot of these desires.
I would love to live on the beach down on the east coast of Florida. I have visited there a couple times and I love the white sand beaches. I just would want to miss the hurricanes. Other than that it is perfect.