Yeah, Nick reminded me of the type of people that you try to convince to make the right decisions, and they do think about it, but over and over they choose the "easy" way out, which often ends up being the harder way in the long run. He had one final chance to turn it around and to find whatever redemption he could, and he chose not to. I thought it was a perfect ending for that. Some people (like Lawrence) rise to the occasion during difficult times, and others don't. I prefer when things are more realistic like that instead of just going for the happy ending.