Wow, that sounds like a crazy trip.
I went on a vacation to Colorado a few years ago and hit most of the same places you did. Denver seemed pretty cool, but we were only there for a few hours. Brekenridge was nice, but a little bit too touristy. Colorado Springs was really cool and Pikes Peak was amazing. It was totally different from anything I'd ever experienced, you really feel small up there. The Air Force Academy was really neat too.