Isn't it sad to go to your grave without ever wondering why you were born? Who, with such a thought, would not spring from bed, eager to resume discovering the world and rejoicing to be part of it?
Making a film of a work you've played for six weeks gives you intimate knowledge of the character. By the time you go in front of the camera you've worked out the behavior and life of a character.
A bad guy always assumes he's going to win, whereas the good guy has to struggle with, what if I lose?, and the audience wants to struggle with him.