What makes a good blog post?

I don't read many personal blogs. But this assignment for Digital Media class poises the above question, and I think I can come up with some general attributes that may be found in some of the better blogs. First of all, a blog must have something to say, some sort of topic or agenda. Anyone can make a self-obsessed Twitter account letting the world know "just took a shower," "working on homework," "drank a Dr. Pepper," etc., but why the hell should anybody care? Not to say that a blog should lack any personal touches or anecdotes. In order to not be a lecture, a blog, just like any type of journal, should have a personal stamp upon it, because the medium tends to have a certain informality about it. However, such informality shouldn't be taken out of hand, wtih obvius speling erorrs and oBnOxIoUs fringes (though admittedly I'm somewhat guilty of that in my blog title). Grammar nazism shouldn't be required, but in order to retain some kind of credibility, a good blog should demonstrate some competence in the way it's written. Well, it's about time I wrap this post up, because I believe a good post shouldn't ramble too much. Not all writing should cater to an ADD generation, but I want to leave prose to novels. People typically visit blogs for digestible bits, so I'd like to give them one right here.