I may not be old yet, but I am old enough to figure that people are not unique. There are no billion plus personalities. There are some very clear and valid personality types. People’s behaviour has many common characteristics. Any given situation would have a similar reaction from every set of these similarly-wired people. I am happy as well as disappointed about this. Happy that it saves me energy insofar as I am not left guessing about people all the time. I can tell what reactions would come out of people. But it is unfortunate because, well, the universe of reactions is quite small. There are some standard things you can expect, and you invariably see them staring at you. It is so boringly disappointing.