I had always thought that I would like to move somewhere quieter on retirement and I had planned the great escape, but after a friend's experience of doing that, I decided that you have to be careful of where you choose as you can be too isolated. So now I am thinking along the lines of Leogirl.
As you get older, you need to be where you can access services and facilities. My friend moved to a small village that was an hour's drive from the nearest motorway and you needed to drive to the nearest large town to access any services. Then with failing eyesight and not being able to drive and not on a good bus route either, she was forced to move back to where she came from. And then it may be difficult to do that, if you are moving back to a more expensive area. Unfortunately, the places that I have considered would put me in a similar situation. So now I am looking for a small town with easy access to open countryside. And guess what, that makes the house prices that much higher. Plus the area where I live has a fairly benign climate, so that is something else to factor in.
Ideally, I would like trees, hills and the sea within an hour's drive with good access to a doctor, dentist, hospital, supermarkets, on a bus route and not in the centre of town, but easy access to a live music venue and places that I can go birdwatching. I don't want much. ;)