Euthanasia most commonly takes the form of providing adequate relief from pain in the knowledge that the person will either remain unconscious until they die,
In that case, I'd like the doctors to keep my body (or the body of someone from my family) alive indefinitely. For decades, if possible.
People get better when odds are greatly against them. Medicine advances.
You are breaking away a tradition of medical ethics going back to Hippocrates himself, nearly 2400 years ago. Use executioners or specially trained killers if you want to off yourself, a healer should never do that and that imposition is the most sickening thing of this whole argument. One of my friends said that he would give up being a physician if willfully determining and causing the death of patients were to become part of his future profession.
Plus there is a big thing with giving such powers to daddy state. Death penalty is one thing, you kill a man who has done a heinous crime and has been judged accordingly. Killing people because they are sick or because they or their family have "consented" to it should be infinitely more complicated and give rise to all sorts of errors and horrors:
dailymail.co.uk/news/article-2255054/60-000-patients-death-pathway-told-minister-says-controversial-end-life-plan-fantastic.html