I agree to the following statement:
good = you value the well being of others over your own
evil = you value your own profit above the needs of others
So instead of only having 2 options (good and evil) I would split the good/evil scale into 5 categories:
- strongly evil: You do evil things because you like it. You do whatever you want and you do not care about others. This does not mean you kill everyone. You do whatever has the greatest benefit for you and you can get away with it. You don´t kill a poor villager when the guards are standing right next to him (nothing gained, too much trouble). You don´t kill or anger someone when you need their help to achieve your goals (this can wait until after they stopped being useful). Often it is better to manipulate others to do what you want then to kill them. Even a complete sociopath needs a little bit of self control when he wants to achieve his/her goals. Killing everything just because you can will get you killed fast for no benefit.
- mildly evil: You do what benefits yourself most and you can get away with. You have no problem doing good things as long as you profit from it yourself. You avoid doing evil things unless you profit from doing so. When you do something evil you try to hide it from others.
- neutral: You help others except when doing it would cost you too much. So you will work to help others but you will absolutely not sacriface something importent from yourself to help others (not giving money or items to others just because they need it and definitely not sacrificing parts of yourself or your own life for others). You try to maximize your own profit without doing things that are considered evil.
- mildly good: You want to help others and you want to avoid doing evil things but everything needs limits. You will not put your life in danger for others and you will not do tons of work for free just because it may help others a bit. (example: You will not run into a burning building to save somebodies pet but you may give them some money so they can stay in a hotel now that their house is destroyed.)
- strongly good: You will help others and even put your life in danger for them just because you thing that this is the right thing to do. You actively fight evil forces even if they did not do something bad to you and even if you do not profit from doing so yourself. But even goodness needs limits. You don´t chase a goblin around the world just because he stole an apple.
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In that sense I may play a neutral char. I will generally follow a good path, but being deceptive or maximizing your own profit is totally OK as long as I do not do something evil towards good or neutral people.
My fovourite evil char:
Kreia from KotoR 2. She is a complete sociopath who uses other people as tools to achieve her goals. It feels good to have an evil mentor.
For example an advice from her: "Beware to become friends with your companions, you may need to sacrifice them later."
My answer that improves my relationship with her: "It would be even better if I can convince them to sacrifice themselves for me."
Prof. Dr. Dr. Mad S. Tist 
