Denver here. Lived in Boulder for 10 years prior. I think Colorado is a great place to live with good people in general. Personally I hate winter and the show. It's 100 degrees today and the sun will melt your face. Love the summer.
There was a thread a while back about people meeting up to drill some techniques. I haven't had time to investigate but it sounds like a good idea. I need time to just drill this system and when other people aren't focused on it it's hard to practice. We don't focus so much on it at my school so during randori @ 100% I have to try out all the moves for the first time. I find it difficult that way
Denver is my favorite city in Colorado, but other people really like their towns as well. Lots of different options.