I lived in Boulder for years, went to CU... left just a few months ago actually. I loved it, but I had plenty of like-minded friends to go shooting, yell at hippies, do stuff with.
It is super-lib, and I kinda got used to it. At first it was tough to be around so many idiotic people, but I stopped letting myself get upset. It's a beautiful city, close to the slopes, close to Denver, tons of great local breweries, good bar scene with lots of... scenery
88-93 and 75spill are right. For a year I lived in Broomfield and did the commute to school - it was nice to go home outside Boulder, and be closer to Denver. That would also be good if you don't want to be inundated with hippies and liberalism right off the bat.
In terms of food, fuel, utilities, Boulder compares very closely with surrounding areas. The only things to consider about living outside Boulder and commuting vs inside Boulder are:
- Rent
- Commuting costs (time+money) [there are some good bus routes]
- Psychological cost of living inside the People's Republic of Boulder
So, depending on how many people you know inside Boulder, I would certainly recommend a bit of a commute.