If you could pick how old you are going to be when you die, what age would you prefer to live till? How old do you want to be when you die?

It is hard to give the age I would prefer to die,but it would be the day,that I can no longer do things for myself.I would like to live for many more years to come, but when the day comes that I have to depend on others, to do the simplest of things for me,that is the day I want to die.