The ancient Greeks believed that your personality was defined by the amounts of four substances in your body. The idea was that too much of one humour made you behave in a certain way. Too much yellow bile makes you a choleric person. Too much phlegm makes you a phlegmatic person. Too much blood makes you a sanguine person. Too much black bile makes you a melancholic person. It's gross and completely stupid but it's still fun to find out.
This quiz is in a book called 'Who do you think you are?' by Alice Harman and Blok Hayes. It's really good and there's lots of other quizzes in there that I hope to turn into scratch projects too. By the way, in case you were wondering, I'm melancholic :)