I know the expected answer should be something like Abraham Lincoln, Amelia Earhart, and Martin Luther King, Jr. because that would be a really fascinating group, but I think I would really pick my great-grandparents, Felix and Savilla (whom I miss dearly) and Savilla's daughter, my grandmother, whom I never knew. Just to have those three in a room together . . . to ask questions about their history, and their dreams, etc. would be very interesting.
Editing is the most difficult process . . . or rather ending that step of the overall process . . . because I am a perfectionist. When I start to realize I am not improving the work wholesale, but simply re-writing portions of it, that's when I know I have to stop.