Characters good and bad

I've been reading a few discussions about that fandom favorite, who is good or bad in HP. I think the reason I always find this kind of discussion pointless is that "good" is not a state of being, like being asleep or awake, blond or brunette. It's an on-going struggle in which your past choices influence what your next choice is but don't guarantee your next choice will be right.

( Even in HP )