I enjoyed my time, but I was a horrible student for the same reason. I remember in one of my course (something about computer logic) that was fairly early in the morning. I would fall asleep almost every lecture. I never opened the textbook or studied anything. Near the final approaching the professor looked me straight in the eye and told the class that you wouldn't pass if you slept in the coming lectures. I still did and got a B in the course —which was apparently on the high end. Meanwhile I failed several easy courses because I just didn't do the work.
We really need to figure out how to make highschool function properly for us who have an easy time with it.