Why do you need the game to acknowledge your actions as good or evil? You don't know yourself?
Why do you want to complete quests? Achieve milestones? Isn't enough for you knowing you did something without some journal update or acknowledgement from the game. I mean why not just let all that stuff reside in your head?
Or for that matter why do you need someone to keep score in any game?
The answer of course is that's the game -- whatever it the game is be it making a sentence that only uses words that start with the letter 'b' or only choosing "Lawful Neutral" responses in a dialogue you want to want to know how you've scored. That's the challenge, can you see through the eyes of your character. I don't really think that "oh I just did something awful but in my head I had a good reason for it" so sophisticated role playing. Neither do I mean to insult but I tend to think that style of tends to spring from "I want imagine doing terrible things but not feel bad about" instead of "let's really get into this role" mentality.
Yeah, people will disagree. They will think the umpire called a strike when he should have called a ball. People will discuss the decision, they will lobby to have the decision changed but that's not a bad thing. I mean why is food for conversation bad?
PoE's reputation system was fine but not as interesting as alignment IMO. Less sophisticated, more real to life, less fantastic. I luurved the PoE1 story but the distopian fantasy world. Eh, it was okay, not as good as Faerun.
Oh, yeah. @kanisatha and I are different and we don't communicate outside this forum. I recognize him from the beamdog forums and that's it. (or did before I got myself banned for arguing with a mod) We generally agree on alignment.