Actually, IBM used use 12 O'Clock High to demonstrate types of leadership. Great movie. I love what they can do with CGI nowadays, but I hope they NEVER remake 12 O'Clock High!
Another interesting leadership study is by watching three different films of 'Mutiny on the Bounty'. Even with the same storyline and same script in many scenes, the deliveries differ dramatically with completely different meanings between Clark Gable, Marlon Brando and Mel Gibson as Mr. Christian, Charles Laughton, Trevor Howard and Anthony Hopkins as Capt Bligh.