Coming from the State (not to mention the same frickin' county) where the one person who made Euthanasia a national story (i.e. Dr. Death. i.e. Dr. Jack Kevorkian) for the longest time...I've heard more about this than any of you (unless you've had first hand experience or find this kind of thing fascinating) probably have.
If you, and I mean you specificially, feel so strongly about having the right to die at your choosing...then get a DNR (Do Not Resuscitate) Order and make sure that your family knows about it. If you've got a will/living will, put your wishes in there. And make sure your family/loved ones know your wishes. Hell, give them Power of Attorney if you have to...but make sure you've got as many bases covered as possible. Otherwise, I think that other family members/loved ones do have the right to make decisions for you.
Ideally, no one should contradict your wishes when it comes to pain and suffering but I know that's a gray area and we obviously do not live in a perfect world.