What rule books have special rules in the social section that require players to think more than simply chat and throw dice?
I think most rule books only distinguish between types of social skills, such as persuasion, charm, intimidation, and deception, but there are also rules that have good design, such as the Intimacies rule in Exalted 3e
Too many rule books focus on improving the combat system, and many times I feel the need for detailed social rules to obtain advice and assistance.