Chaotic Neutral
From Dragons Exodus
Chaotic Neutral is freedom from both society's restrictions and a do-gooder's zeal.
Chaotic neutral characters follow their whims. They are individualists first and last. They value their own liberty but do not strive to protect the freedom of others. They avoid authority, resent restrictions, and challenge traditions. Chaotic neutral characters don't intentionally disrupt organizations as part of a campaign of anarchy. To do so, they would have to be motivated either by good (a desire to help people) or by evil (a desire to hurt people).
Chaotic neutral characters may be unpredictable, but their behavior is not totally random - they are not as likely to jump off a bridge as to cross it. However, they do act on momentary whims, and are known to be unreliable. As some would say, "the only reliable thing about them is that they cannot be relied upon!"
A wandering rogue who lives both by work for hire and petty theft, an eccentric mage who experiments with dangerous magic just to view the results, and con artist or hustler who plays all sides against the middle to further his own aims are all examples of chaotic neutral characters.