Some people are terrified of death, and others go through life w/o any fear of dying. We all hope that when that day comes, it is painless, however there are some people in the world, who have done horrible things to others, and IMO don't deserve a painless death.
On the same token, some fear pain, while other fear emtional suffering. For me it has always been emotional. I can deal with the physical pain.
With that said, what would you believe would be the absolute worst way to die?
For me, it would have to be:
Being trapped in a lethal situation (burning building, sinking boat, etc.), with a loved one, and not being able to save them. I would not be afraid for myself, but to helplessly watch someone I love suffer, would be worse than anything I could imagine.
Knock on wood!