Writing for fun?

Here is a touchy subject for some people, myself included. I don't write for fun nowadays. There were times that I wrote for a fantasy forum back in high school. It nearly consumed me for 2 weeks. I couldn't wait to think something new up that would happen to my protagonist. I still have that writing. I love to look back and read it. I come across so many sentences where i say to my self "did I really right that?" I think it can be beneficial to read some of your own work that was created for pleasure and not for a grade. Its almost like examining a hobby, and we all know how insightful that can be.