Oh man - what a difficult choice. I think my knee-jerk reaction is to say yes, I want to have that choice, and you make me pause my decision when you say you like the time to give others with him/us. But how much? When does the person get to say enough and when do others stop saying - give me some more?
It's quite complex, but ultimately, I will stand with each of us having control over our bodies and with a terminal illness - I can see where I would not want to be a burden medically and financially especially knowing I am ready to die.