It depends on the game, really. In SMT4, I leaned a bit towards Chaos, but in SMT3 Chiaki's Reason was basically fascism, combining the caste system of Law with the violent nature of Chaos. Idk what Reason I'd go with in that game.

IRL, it's a much tougher call. I don't want to say Neutral, because that's the boring answer, and I'm not entirely satisfied with the status quo of my society, but neither Law nor Chaos is actually going to fix any issues