I would choose to live forever. Imagine what it might have been like to live in any of the world renowned cities from the time they were horse stables and watch them grow to become metropolises.
And in the case of Detroit, watch it turn back into a horse stable. :)
That would be nice but would you be willing to go back to work since it's unlikely your savings and Social Security would be able to sustain you for the rest of ...eternity.
We are not talking about time travel. So you would not see those things at all, you would see from today forward. I do not see much to live for because it is only going to get worse from here I suspect.