Ever seen someone dieing by inches in pain, stuck in a bed. No choices, unable to do anything, or change the outcome? I have, actually, in many cases, its really not that bad a way to go.
Considering the chances of being a vegetable in a hospital, or suffering in agony for weeks from cancer, it really could be much much worse. Now some might prefer to live longer, die in there sleep. But the fact remains we have very little control over all that. Much better to live a good life, and die with your boots on.
John Denver comes to mind, along with many others.
Me I'll be happy as long as it is fairly quick.