With permission, I'd like to change my Alignment to Chaotic Neutral, with an explanation.
In my experience, most people equate "Chaotic Neutral" with insane, unpredictable, and prone to changing his mind on a whim. That's not how I see it; I think that definition comes from a fundamental confusion between two different definitions of "Chaotic." Most of the time, they talk about "Chaotic," with regard to alignment, as being the opposite of "Lawful" - that is, disorderly, independent, and living by rules from within, rather than obeying laws or rules imposed from without. But when talking about Chaotic Neutral, they switch to the other meaning of chaotic, meaning random, disruptive, and unpredictable.
For my character, he's Chaotic because he lives by his own code of conduct, having little regard for laws or other people's ideas of justice. And he is Neutral because he isn't either expressly evil or good - he can do noble acts for the sake of doing them, or he can commit great evil if he believes it should be done. For example, he might volunteer to work for a warlord for free if the warlord was furthering a purpose that he agreed with... and might then turn around and assassinate the warlord if the warlord stiffed him on payment. He has no qualms about killing people who piss him off.