I really like role-playing games with asynchronous mechanics, i.e. where each player doesn't play the same way (and I'm not just talking about the GM/player division). Badger + Coyote is a very cute example of that: you play as the two animals of the title who wander around the countryside looking for food, one using his social skills, the other one using his hunting skills. The goal is to find food without becoming too much of a stranger to your friend, so there are two different and combined rule systems. It's very cute, it's very pretty, and it's a very good idea, so it's a very good game.