Brian Heys responded to a comment I left on his blog a few days ago with a reflective post on why people stop blogging.
My take on why people stop blogging is: because they have no reason to blog.
That's not as dumb as it sounds. When I started my first blog experiment a few years ago I did it because I felt that I should. I had suspicions that blogging could be a useful educational tool, but I was far from sure. So I blogged. It was hard work. I got no feedback. After a few months I stopped, because I had no reason to continue, and blogging is work. Hard work. Precious time when you could (and possibly should) be doing something else.
Around 18 months ago, I found a reason to blog. The initial impetus was a group project to promote a new course. The project was both inward looking and outward facing. It was a new (to me) approach to an old problem: bums on seats. I had found a reason to blog. I soon saw that the approach could be applied to other problems. Soon, I had three blogs, then four, currently five. I couldn't stop blogging.
Back in the day when I was a keen but not very good squash player, I "enjoyed" getting thrashed by better players then me (and hated occasionally losing to people who were not as good as me), because by enduring the humiliation, my game improved. When I started blogging again, I found I was being coached by people who were better bloggers than me. Better writers. Better thinkers. People who gave me more and more reasons to blog.
Now, not only can I not stop blogging, I can't stop encouraging other people to blog.
And having read this post, you're one of them :-)