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Passing with dignity and on your own terms? Sign me up (when the time comes). I know a provider who does these. Death is often a very sad thing, but in the medical field transitioning to providing this service as comfort, rather than simply preserving life of any definition, it can be a loving, even more celebratory event.
She put it simply, "would you want your last words to be 'I love you,' or 'I can't breathe'?" You can be a vegetable in a hospital bed, or you can be in your favorite chair at home, listening to your favorite music, with friends and family by your side. I know which option I'd take if I am fortunate to get to choose.