I like to investigate all different kinds of people, I guess, and find out what makes them who they are, and try to be honest in the portrayal, and truthful, and find out how to understand that person, how to communicate that person's experience.
That's what it is that you rehearse - the making of music, not the playing of notes as abstractions.
It seems to me that humour is everybody's way of keeping sane and standing off from the situations so that they can see it intellectually, as well as emotionally, and I don't know whether you've noticed, but if somebody tells a joke, it's nearly always a mini fantasy.