I fear the shit outta death. Every part of it, the unknown, the possibility that there is nothing afterwards, the possibility that there IS something afterwards...
If there is something after death, it may be a something established without human ideals in mind- probably being as old as time itself. As such, I am doubtful that it would be even remotely pleasant for, or even compatible with, humanity.
If there is nothing after death, then what, precisely, was the point of everything we've accomplished? What does it matter? All that exists of me is the memories of those left here, and those will fade too.
But, hey, that's pessimistic, right? Maybe we do have a lovely, idyllic afterlife.
EDIT: Do not feed the trolls.