Blindswordmaster said:
What would you do if you were immortal? You can't die and you'll live forever, what would you do with all that time? Let's even make it retroactive: You're an immortal and you've already observed and interacted with the entire span of human history.
I'd do it again, but make changes. If I'm immortal and can interact with all of human history, then I can make changes too, by influencing certain events. Just to use the cliche example of Hitler, I could kill Hitler during my second go around, before he ever even joined the Nazi Party. Then I'd be able to see the rest of history as it would be if he hadn't survived. There are so many other experiments too that I could do. It would be a matter of curiosity on my part, nothing more, but since in this case time is cyclical then things like people's lives and deaths wouldn't matter to me.
I have one proviso though, if I was going to be immortal like this. Immortality is bloody lonely, so I'd want a companion (ideally the girl of my dreams) to be immortal too, and we'd travel and live together for this eternity of repetition. Hey, it's all hypothetical anyway, so I can make demands if I want to, right?!?