Joe Wirtley recently wrote a post explaining why you should have your picture on your blog. I agree with Joe. I would never have known what Michael Eaton looked like so that I could introduce myself to him at the Ann Arbor Code Camp had I not seen his picture on his blog.
Though I have never specifically added my picture to this blog I did recently add rotating images to the top banner, some of which include me. I am the adult male in those pictures, though I am much more handsome than those images give me credit for. In fact, I currently weigh at least 20 pounds less than when those shots were taken, but I'm still a work in progress.