The best yet the worst thing that can happen to a student is a dissertation. I got an A grade in my dissertation just FYI, but that was only because I got cheap dissertation writing services online. A dissertation is the best in a way that it can make you realize your limits outside of your comfort zone, you work hard, you get along with people, you go for researches, and whatnot. And, I guess we know why it is the worst hahaha!!