Since the western slope of CO relies almost entirely on mountain snow melt for its water supply, I think it's wise to take climate change into consideration. I loved living there, but I don't think I could move back, in part because of climate change and wildfires. Also, I think coming from a major European city to CO could be a bit tough. You're sort of on an isolated island. The wilderness is fantastic, but you're gonna have to fly for any decent city experience (sorry Denver, you don't count).