The Four Tendencies by Gretchen Rubin is about how we respond to expectations that others place on us (External) and the expectations we place on ourselves (internal). Never have I had a book peg me so well, it has helped me understand my personality better and more importantly make productive changes. Hopefully you can get as much out of it as I have! I highly recommend that everyone read this book and I will include links to the book on Chapters and iTunes as well as a link to a quiz to find out in which of the four tendencies you fall into. It is important to note that this personality framework is only about one thing, how you respond to expectations, how exactly these tendencies will express themselves in your life is dependent on your personality as a whole, if you are honest though, you will find yourself in one of these Tendencies.