My house rule is using aligment with allegiance, and even when these may be opposite, for example a chaotic sherif who breaks the rules usually to defend the law, or a zealot doing evil actions in the name of the supreme goodhood. And spells or other powers with aligment key can hurt enemies with the same alignment but different allegiance (race, brotherhood, country, religion, family, tribe, clan...) for example a drow cleric vs an orc shaman. I think the chaothic characters need a common allegiance too cooperate to work together as a team. And "chaotic" characters can behave totally "lawful", but only with the members of the their allegiance.
Other house rule is chaotic good means to be attuned with the primal forces, or behaving "lawful" but only with the members of an allegiance.