I want to be able to chose myself.
On the other hand I don't think any human has the right to decide that another person can be killed. So if someone has written down that he wants not be kept alive in koma or whatever then it should be possible for that person to die.
In the Netherlands and in Switzerland where assisted suicide is not punished there have been way too many problems to let you feel relaxed about it: people who suffered under untreated depressions and who were not physically sick at all, people in which case someone wanted to inherit, organizations who helped but took money away from the sick........