I've never seen the need to have a blog.
Maybe it was false modesty, but didn't feel like I had anything to say that people would want to hear. Or maybe it was because I've always worked for organisations where I've been the "expert" on web design, and I was concerned that my musings or rantings would affect the organisations's reputation.
Things have changed now.
Now that I work for myself, I don't have to worry about PR or political correctness. So I guess I can say what I want!
As long as I think it's worth saying...