Not sure when I came to this conclusion but I can't imagine living forever. After a while I think I would be completly bored with everything.
Not saying I wouln't like to live for a few hundred years or maybe even a few thousand if I could travel through space and discover other universes Star Trek style. But the thought of living forever sounds like it would eventually become a complete drag.
Maybe i'm wrong, maybe after a thousand years or so you would foregt all the stuff that happend at the beginning and just start over in an infinite loop.