"A blog is a place where you can create a community that centers on exactly the issues you want to discuss, with the people you want to have a discussion with. It's like throwing a big dinner party where all the people are interested in exactly the same conversation as you!"
It's interesting to watch the evolutionary process, as comment spam learns to mimic humans. First, it was just bizarre. Now it can reliably do: blurbling sycophancy. What it needs to learn is: spunky and irreverent.