I feel like it keeps me on my toes to read the comments from people who don’t like Daring Fireball.
I used to read every comment someone made in reference to my site, by way of seeing an incoming link in my analytics and heading over to the source. I’d still do that if I had analytics to work from. It’s invaluable to see that commentary and downright painful to read it. (If you do link to the site, never be shy about sending me the link, even if it’s in disagreement with me.)