I've decided to take a break and defer to the highest ranked blog in the 24th.
Really, what else need be said?
"That is the noir character. Alone, a loner in a world he knows he can’t fix. Alone in a world that has turned bad, full of betrayal, deceit, dishonesty, crime, and vice. Maybe it always was bad. Yet, he keeps his own personal code of honor. It is the only useless thing left for him to hold onto."