Eh, I figure I might as well throw in my two-bits.
Personally, to me, the only way you can truly do evil is to go against your own morals, ethics, and conscience. If you just blatantly ignore what your body, and arguably your soul, is trying to tell you, then it will more than likely be evil. But that\'s more of a \"be in harmony with the world argument\" rather than defining good and evil.
I liked Draklar\'s definitions. To me, a Lawfully-Good person is a Knight, a Champion of the weak, upholding honor, chivalry, and fighting the evil ones with a vengeance. I don\'t like em ^^\'. Chaotic-Goods are the vengeance-type people, the Robin Hoods of the land. In the end, their deeds are beneficial to all, but it\'s not exactly very legal.
Lawfully-Neutral would be...someone who doesn\'t take sides, someone who obeys the laws of neutrality. Chaotic-Neutral would be...hmm...someone who does what he wants when he wants, and is either aligned with no one, or has both good and evil alliances. He\'s not evil, but he isn\'t good either.
Lawfully-Evil people would be evil by profession. Typically nice guys you might get along with, but you\'d never want to get on their bad sides. Sangwa and Draklar are good examples, I think. People who have a code, morals, ethics, but are evil because of their profession, not necessarily their personality. Chaotic-Evil people would be the ones to look out for. Chaos, rampage, destruction, those are their main tools. They do what they want, when they want, and not too many people like them. A good example would be a thief who kills his victims then takes their money.
That\'s my take on everything, with the main difference between lawful and chaotic being following the rules vs following your own rules.
And sorry if I wound up repeating some things, because I only skimmed through the last half of the forum thread.