this is a heck of a question... going back, it already happened so why live through it again, especially just as an observer, that could bring more sadness reliving the same day of loosing someone, now if I can go back in time and relive the day I spent with the Beach Boys now that would be another thing lol.... ( I am old lol) Going to the future now that would be a an experience to see how much more destruction human being did on our mother Earth and maybe I could come back with a very strong message for humanity.... or maybe just to see all the great great great grand babies I will never meet and give them a few pointers, if that is allowed or are we just observers...then I would just observe. I love this question, and I asked myself that same one a few times: would I want to go back or move forward