I don't know why, but this question fascinated me when I came up with it. I mean, if I remain ME there are a lot of favorite movies that I wouldn't want to be in. I'm just not prepared for it. I love Serenity, but I have a powerful need to eat and I don't like shootin' much.
I know that Middle Earth would be fascinating so I'm going for Lord of the Rings. Do you know if Gandalf needs an accountant... er, scribe?