Eh...I'd rather help people who are alcoholics and those who are depressed - it's something that can be cured with good treatment, love and care.
Euthanasia for that? No way.
As for point 2, I meant all those things - there are people who can't even see, walk - anything that takes their quality of life away, those who cannot think for themselves, and are therefore living a life of suffering in which they are trapped.
Of course, before I'd let someone be euthanised, I'd give them the best possible options to improve their life status, that's if the person wanted to.