[sirdogealot]

A friend of a friend of mine's experience answers your number 1 question:

He wasn't very good at aiming, apparently. When he shot the bullet into his head, probably in a drunken stupor, he missed his brain and lived... probably still wanting to shoot himself and succeed, but being physically unable to do so at this point he just lay there until someone found him.

By the time he recovered in hospital from the wound, he wanted to live! Albeit with a very disfigured face, which I thought would be a hinderence to an already depressed individual, but he sees it differently and we're all glad for it!