If I could be a character from a book or film I would want to be a time traveler in one of Connie Willlis’s books! Doomsday Book, Black Out, or All Clear. To examine the past and travel back to the middle ages or WWII would have been amazing to explore and bring back information to use in their research.
Sometimes it was scary being in the middle of the plague or the bombings in London but they made it through.