I'm with Asherdan. Only compulsive people are forced to read every word and then criticize someone's effort when they are done. But there is some pretty worthy stuff out there, if you kiss enough toads you will find a prince(ss).
Blogging isn't ALL that different than posting to a board like this, though, is it? Here we are probably a little more economical with the language, and it is more fluid and dynamic but, for the most part, we all write something expecting/hoping that someone reads it. Sort of like a Blog but with a little less exposure and, in many cases, pretentiousness.
I tried to have a blog shared by three or four people. They were all interesting, intellectual types. Only two of us would post to it, though, so it was pointless to me and I killed it. I still think it is kind of a neat idea to digest the issues of the day amongst four people with very differing views (I had a radical Methodist minister, a seminary dropout who has advanced degrees in Ethics, an artistic hippie-type single mom and me, the libertarian civil servant. It's sad that the AWESOME phone and e-mail conversations I have with all these people didn't translate into an interesting and mosly literate blog.