Putting all religious and philosophical beliefs aside - which scenario seems of the more frightening of the two to you?

Death? Or existing in this reality forever? At first, the existing forever part didn't seem to bad... until I began of think of some insane number, like billions of years. That... scares the hell out of me, more then thinking about an existence that is like a deep sleep - completely neutral.

The optimal existence in my opinion would be similar to our sleep cycles. Everyday we go to sleep and take a break from reality. If we didn't sleep, guarantee we'd all go insane. The best existence would be one where after every life, you'd take a very long break (death), and come back without your previous identity. I mean, the way I see it, even paradise forever would get boring.