Middle school was like the unexpected prequel to high school for me; you never really expect anything to happen and when you actually get to high school, you realize that some stuff has indeed gone down that helped you get a leg up in high school.
...But only 8th grade/junior high.
I only say this because it was middle school in which I started getting out of my shell as a shy, timid, and introverted individual. I made a lot of diverse friends and explored several hidden interests that I was unable to pursue until then. Music, movies, sports, social events, etc. were a complete mystery to me until I got my cool new friends. We also had a few misadventures that only got more zany and intense when we got to high school.
I was also class president, so that probably had something to do with it.