Actually, I would be Mrs. 20-20 hindsight. But regarding my Living Will, I don't have one. The reason I don't have one is because I WANT to be kept alive. I don't want to have the plug pulled. Bottom line - I prefer to err on the side of life, just as the president and pope said.
It might be a good idea to put that in writing and explicitly say that no oral declarations shall authorize any alteration of the directives unless they are recorded in authenticable tangible form such as a camera-original analog videotape.