What Motivates Bloggers?
I think such bloggers fall into one of the following categories:
 The Approval Seeker: "I will only allow those comments which agree with or praise my brilliantly intelligent and beautiful posts. My blog is a tool for my journey through life which I have decided is a popularity contest in which I must look good at all costs. I like Facebook and Twitter."
 The Forum Moderator: "I will publish any reasonable, on-topic comment, whether it agrees with me or not. I wish to promote debate, not stifle it. Who knows, I may even learn something."
 The Desperado: "I will publish any comment, no matter how stupid, off-topic, vapid, or irrelevant. I am mesmerised by the comment count. The more comments my blog gets, the better my blog must be. I like Facebook and Twitter."
Feel free to submit more categories.