Re Colorado: thought about this one pretty seriously, to the point of flying out and staying for a while (been there several times before as well). The Denver burbs would be nearly perfect if the landscape wasn’t so ugly and the air so dry. That awful 3am wakeup, mouth-breathing, dry-as-dust feeling was the deal breaker.
In the end, we realized that we’d get a better deal on a house in Temecula, the weather is better, and we’re still close enough to the ocean that we can make a day of it once in a while.
THEN we realized that San Diego is actually becoming affordable. We’re probably not moving anywhere, but if we did, it would be Greece.