10. The main intellectual activity of your childhood consisted of making lists, from airplane models to French words of Arabic origin and vice-versa.
9. Your parents took you in their Trivial Pursuit team, encouraging you to memorize all the cards.
8. Your high school teachers gave you books that you keep rediscovering every decade.
7. Now that you've grown up, your innocent list-making has turned into an addiction for collections: music, books, films, whatever can be acquired into a hierarchy of categories.