He never harms anyone if he can help it, nor will he allow people to come to any sort of harm by ignoring them. He's always willing to go out of his way to save the town and complete strangers. When the call comes, he will answer it, usually with very little protest. He will often help people in need with little promise of reward. In almost every way, he acts like an Ideal Hero.
Except that he's asocial and sometimes downright abusive toward most enemies he meets. He may refuse to explain anything. He may actively rebuke people who express gratitude, friendship, and love as well as offers of support if he's got a problem. Let's face it; Good Is Not Nice.
To those who don't known Affably Evil is when a villain is polite, friendly and genuinely kind, even while plotting evil. Good Is Not Nice is the inverse of that: a character who is morally slanted toward the good side but is rude, unfriendly, and mean.
There are a few reasons a person may act like this:
1. He may want to be selfish and arrogant, or just unbiased to either side of the conflict, but his morality keeps on getting in the way, even if it's to his detriment.
2. Unlike Type 1, Type 2 is not putting on any facade. This is because he really does believe he's better than the regular Apathetic Citizens, and ranges from Smug about one's abilities all the way to Arrogant Jerk. After all, it's tough to be nice to people when you don't even respect them. However he still feels compelled to help these lower creatures on a regular basis.
3. He's a natural loner. His sense of duty forces him to perform heroic acts, but he does not consider chitchat, or politeness, to be one of his needed duties.
4. He may want to be a nice person, but believes in tough love, particularly if he has to teach something.
5. He can't afford to let others get close to him because his enemies will use them against him.
6. The world he operates in has a somewhat cynical take on things, so Strict Good Guyism doesn't work.
WHAT A JERK!!!