I used to be pretty firmly against having comments, but Orin's experiment with allowing them led me to dip my toe in the water, and now I've tumbled down the slippery slope.
I expected most comments to be thoughtful, on-topic, and interesting, and they have been. But I've been struck by just how many good comments there have been, and how few bad ones I've seen.
I know, I know, famous last words, and maybe I've just jinxed it. Still, I've been very pleased by the results, and my sense is that many readers enjoy being able to comment (and even to read others' comments), so that's a plus. I expect to enable comments on most of my posts in the future.