I like Wyoming because they hate CSU and beat the snot out of them on a regular basis.
This and some other things as well. Wyoming doesn't spend their time trying to pretend like they are something they are not. They recognize that they are an "underdog" and thrive on that identity.
Wyoming also does a great job of recruiting Colorado kids who are the low FBS/high FCS level players who a CU is normally not interested in but who deserve a shot. A lot of those kids turn into good players for them. I wouldn't be surprised if many years there aren't more kids from Colorado playing for Wyoming that playing for CSU.