I became a hanger because I had a horrible night while my friend slept in peace. The first day of 4 day trip several years ago we got to the trailhead very late due to traffic. We decided to hike as far as we could and set up camp. It quickly started getting dark, so we settled on a less than ideal spot on a hill. My friend set up his Clark and was eating dinner in short time.
My tent pole broke as I was setting up and I ended up having to do a bit of improvising in the dark with ropes and sticks to keep the tent from falling on my head. It eventually did in the middle of the night and I spent a miserable night on rocky sloped ground. My friend was refreshed and ready to hike the next morning. I was not quite so happy.
The next time I went camping I had a Hennessey, and the rest is history. I won't be going back to sleeping on the ground.