Do you have a neat signature, or a messy one? Do you let the dishes pile up in the sink, or do you clean them as soon as you are done using them? Do you prefer coffee or tea? The purpose of 2 Kinds of People, by João Rocha is to sit down with another person and go through the dozens of side-by-side drawings to find out how compatible you are. It isn't supposed to be a serious exercise, but you will probably learn some interesting things about yourself and your friends and partners by doing it. For instance, not only did I learn that Carla likes to hang her toilet paper with the hanging side towards the wall, she was also able to convince me that her preferred way is superior.