I unquit blogging.
Reasons:
1. I have started collecting a bunch of articles/posts/etc. that I have stuff to say about, and blogging is the best forum for that.
2. I got accepted to the PhD program of my dreams, and can stop worrying too too much about having my personal info & views floating around online (at least until the job search in 4 or 5 years).
3. Rather than using up my energy for writing, blogging puts me in a writers’ frame of mind, more of the time. The additional practice is beneficial, whether or not any of the actual content has merit.
4. It is cool to have a blog.
QED. I am back.

Hurray! :)
The blogosphere can always use more thoughtful people in it.
Hurray too! :)