It's my blog, and what matters to me most about it is that it invites me to write.
When I wrote about power, etc. a few days ago I noticed that I hadn't written for about a month. I may decide that it would be helpful to start a practice of daily writing, but for now what flows most is not having any rules for myself around it.
I've been writing mostly about myself, fairly intimately/vulnerably, and have so far resisted urges to write about other things (process and geeky stuff, and semi-random other things), but will probably start doing so again soon. Some people may prefer to only read about my personal explorations, or only about process stuff or geeky stuff, but these things are often deeply interrelated, so it's just much easier for me if I can publish it all in one place. I tags posts with what they're about, and you can generally click on those tags to see a list of all blog entries (and other pages and links) on that subject. Not as pretty as the main blog page, but functional.