I never liked the Balance version of True Neutral. I guess it works for an Outsider that really is there to balance the universe, but for a person to go around stepping on a puppy because she saved one yesterday, doing a bad deed for ever good... that's goofy and kinda' psychopath.
For me, for regular mortals, the Good/Evil thing is basically, "Would you go out of your way to help someone?" Would you put yourself at risk? A Good person would. He'd run into a burning building to save a stranger. A Neutral person wouldn't. Doesn't mean she's bad, just not going to stick her neck out for a random dude. Would probably run in for her own kids, or might help a stranger get up who fell in front of her, but isn't really going to go out of her way to help someone else. The crown of lookie-loo's are Neutral. And Evil is more than just the guy who stabs people in the face just to watch them die, it's also the person who steps over the guy who got hit by a wagon and doesn't stop to help (no danger to self, no risk, just not interested, too selfish to be inconvenienced). Not necessarily sexy Evil, but selfish to the point where you're causing harm to others... that's not Neutral anymore, that's a choice and it crosses into Evil in my book.