Medrants asked if a good death is important.
I think so. My father had a good death. He was diagnosed with congestive heart failure (this was 20 years ago), sent home, and was given some home nursing and equipment and basically left to die. It did take 3 years, and some of it was painful, but he did adjust well. We had plenty of time to talk and resolve issues. The only invasive procedure was a catherization, but that was his choice, he wanted to make sure why he had congestive heart failure. Most was congenital.
My mother-in-law had a good death too. She and my father-in-law were in a car accident and she was killed instantly. They had just been visiting their grandchildren and were on their way to a card show. They were in good health and she just went.
Even my father-in-law went relatively easily for him because he never regain consciousness. However, my husband and his sister had to deal with decisions. They did put him in hospice care and died a few weeks later without gaining consciousness.
However, my grandmothers didn't fair as well. For different reasons, they were put in nursing homes and had all the care needed to keep them alive. One is still living, and has been reduced to the mental age of about 1 1/2 years. It's very sad, and I wish she could die.
I've had friends deal with parents with lingering illnesses.
If I had my choice, I'd go the way the inlaws did, especially mother-in-law. I certainly don't want to spend my last days in a hospital poked and prodded, especially by strangers.