I was stationed at Mountain Home AFB, and just loved Idaho. Unfortunately I was not able to find a job at all when I got out, so had to move. I hear the job situation has taken a very large turn for the better since then (1984).
If it wasn't for the wife wanting to be closer to her family, I would be looking to move back, for sure.
I agree about folks being a lot friendlier up that way, and there was also a much slower pace of life when I was there, a lot less stress.
I really liked running around in the mountains when I had the chance, but I personally think the flats have their own beauty, just different. Not a big trip to get to the mountains from the Boise area, and for a big city, it wasn't bad, especially compared to L.A. and such.