I lived in Boise for about 7 years and loved it. I guess it depends on what you like doing though. I loved hiking, camping and fishing so I had a blast. The Sawtooth Mountains are beautiful. The best friends I ever made are mostly from Idaho.
I live in North Idaho, and it really does depend on what you like to do. If you can tell me a few of your preferred hobbies, I can verify if that is here. For example, if you like hiking, there's plenty of trails around the state.