There are a lot of great CA at Frontier. Most are willing to share the logbook and some actually ask if you looked at it. CRM is definitely there, and guys are fun and easy to get along with.
That said, there is a group of "old school" "I am God" type CA's that seem to be prevelant in DEN. Some of these guys show up to the airplane and you'd think they had someone **** in the cheerios that morning and their wife left them right after. They are angry, miserable people to fly with. However, I imagine this group exists at any airline.