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I believe that good and evil is perspective. Good is what you also see and evil is the antagonist against your beliefs. An individual will have to justify that on their own terms; therefore, what good and evil is, just basically comes down to opinion. If you're looking at it in terms of society, then it's what the majority of the people that agree with is right.

Is good opposite from evil?
Or is it a balance, with the extremes on each side of it different kinds of evil? Is law a natural part of good, or can chaos also be a part of good?

Mindless obedience to law---Balanced---Mindless Chaos and anarchy

Anyone ELSE want to toss in their two cents worth?

I believe that it's kind of like left and right. From my perspective left and right is defined as one way and from another facing their left and right is opposite. If our individualistic perspectives are removed they are actually the same.

I agree, it is definitely someone's perspective that defines "good" and "evil."

When little kids play with little army toys or whatever, there's always a "good" and "bad" side. The "good" is usually their team and the "bad" is the other kids team. But to the other kid, they are "good" and the other is "bad." I'm not sure if this made any sense, but I thought that was interesting.

it is true that in common usage good and evil are definitions based on opinion and though you could find conditions in which most or seemingly all would agree, it is still opinion.
the concepts of good and evil are historically based around religious beliefs in which a value system is established. you can have your own value system without religion. now a value system often as at least one thing, an ideal. for this example we can use the "light of god", so one with a value system based on the light of god would have a concept of what this means and would judge things accordingly. anything that works towards a realization of the light of god, that which moves toward or points in its direction is good. any act that turns away is evil. the word "sin" has a deeper meaning than doing something that you are not supposed to, it can be interpreted as "to miss the mark", the mark of course is the highest point of value in the case of this example the light of god. now to use another value system there are those who believe that evolution is our goal on earth and they would judge right and wrong, good and evil on those terms. good is that which moves towards or works for evolution and evil is anything that hinders evolution.
now another example is that of the materialist who has as their highest goal power and possessions, to that person anything that increases power or position or makes money is good and anything that hinders such progress is evil. you see this in large corporations who conduct business without regards to the health of the environment or even their employees, money is the bottom line.
now this still leaves the matter as a relative issue, but it can be absolute to the individual.
to me it seems that there can be a compass with which we can judge our actions but i do not yet know how to talk about it, but here i have explained the functions behind it. perhaps one who is in touch with reality and the natural way would have a better understanding than one who works daily with unnatural and artificial conditions.