To be honest, I'm not quite sure myself. For now, I'll just stick to the explanation that it's fun.

See, I first got a glimpse of blogging actively while I was still a student at the HTW Berlin. There was a Usability class in third semester, and part of it was to create a blog and... well, just blog away about what we learned in it. I'm sorry, but that's the simplest way to put it. Even though it sounds weird, it actually worked because we had to reflect on what we were doing in class, what we learned and what we found out.