I lived in Denver for a year and liked it much better than I expected to, and it has only improved in all respects in the 30(!) years since. Like
@Lefty2one , I thought I would hate being away from the water because I had previously only lived on the east and west coasts. It took very little time to start appreciating all the Rockies had to offer, and I quickly found that seeing them in my front or rear view every day did a great job of replacing that sense of majesty that the coast also holds for me.
As I posted in the underrated thread, I probably prefer Fort Collins because it is a cool little college town (Colorado State University) that is just as well located vis-a-vis the Rockies as both Denver and Boulder but it doesn’t have the pretense. The absolute best thing about all of them is the ready access to so much great outdoor recreation stuff like skiing, hiking, biking, etc. so if that’s not your thing Colorado in general is probably not your place. It’s a very outdoorsy place in general.