Second life, of my own creation, would be my choice hands-down.

That said, a quick note for Solarflare: yes, eternity can be a very long time, but if that eternity were spent in a lucid dream wherein you grew, developed, and generally made your self, and your self-induced universe constantly better, wouldn't you be pretty much a god after all those years? Couldn't you also change who you are over and over and over, always changing things up and lending novelty to every new day? I don't see why not.

An eternity is a very long time, but use it well and even it would not be enough...