Fuck. That.
But you should also be aware that many many other people would choose life.
However, it misses a huge amount of nuance. Some of the nuanced questions include: what qualifies as alive? - brain dead? - blood pressure only being maintained with medications? - requiring permanent ventilator to breath? - 'locked in' syndrome where you have literally no way of communicating with the world? - combinations of the above? what quality of life would you accept? does how you die matter?
It's not as easy as deciding to just 'choose death'. Sure, most everyone would choose to live in a healthy body without pain, but that really isn't a realistic choice for most patients who are making that choice at that point in their lives.
Either way, whatever you choose, you should document what you prefer to make things easier on your loved ones.