Bear in mind that we are talking about several different issues here.
1) Right to self-destruction (suicide).
2) Right for others to assist (assisted suicide).
3) Right for others to end the person's life (euthanasia).
They are not all the same thing. It may be a crime to commit suicide, but as noted above, it can only be prosecuted if it fails (however, it is unusual for it be prosecuted at all).
The second refers to people making it possible for a person to complete the act of suicide on their own. It is not unusual (so I have been told) for doctors to allow terminally-ill patients to have more than enough prescription painkillers in their possession to end their lives painlessly if they should choose to do so; even to giving them information regarding what they should *not* do if they do *not* want to fall asleep and simply never wake up (wink, wink).
The third refers to people (commonly doctors) actually performing the act of ending the patient's life. This is active euthanasia, and that is what got Jack Kevorkian sentenced to prison.
It is possible to hold different opinions on the three positions.
True enough. And it's interesting to note that although Kevorkian went through several trials for assisting patients to end their lives (by use of his suicide machine), his only conviction came from the one case where he actually physically administered the lethal injection.
While this obviously made a difference in the eyes of the law, I think it's a very very fine distinction indeed, since the patient in question had provided his fully informed consent, and unless I'm mistaken, was physically unable to perform the action himself.
Personally, I would draw a much greater distinction between assisted suicide of someone able to give their full consent and euthanasia of someone who was unable to (for instance, in a long-term coma). Of course, this type of situation is where having a living will document that clearly states your wishes ahead of time (do not resuscitate, for example), along with giving power of attorney to someone you trust to make these decisions for you in the event that you can't, can be invaluable.