"Annihilation has no terrors for me, because I have already tried it before I was born-- a hundred million years-- and I have suffered more in an hour, in this life, than I remember to have suffered in the whole hundred million years put together." -Mark Twain
I think death feels like the deepest general anesthesia--no thoughts, no pain, just a peaceful void. Just like it was before you were born...not something you will even have to endure because there will be nothing to endure.
Also, I have never been pleased to wake up from anesthesia.