Reviews — My sole story on this site received three insightful reviews at the time, and three personal e-mails, which were equally useful. I counted myself very fortunate. Not a single 'good story' response in the bunch, and I learned something from each of them. (I believe that it has received additional reviews in the intervening years, but I don't receive notice of reviews… or of responses to my own reviews, and I don't know why. Is Safari an incompatible browser?)
I am not fond of the comment system on GaggedUtopia's site. I rather like that the numerical values can be posted anonymously, and that you can re-rate every time an update is posted, but I HATE the anonymous commenting. Almost invariably it's inane, and if you post criticism the next five comments are flaming yours and have nothing to do with the story. A good compromise would be to allow rating without registering, but require registration for comments.