Military guys seem to have the most trouble. It's their attitude and just how they learned and the tools they had flying is so different from us. Going from a high ranking officer to a first year first officer grunt just doesn't sit well with a lot of people and the crm concept is a lot different, many guys are used to flying and doing everything alone.
Manage a four-ship, one guy with an emergency, in the weather and come back to me about CRM.
GF