To make commenting more human, it needs to become conversation rather than commentary. Someone talking at you through a television or lonely comment on a blog isn’t natural and human; a conversation is. If you want to talk to an author, you should be able to do that directly — no public side is needed. Then, if your conversation turns out to be of interest or use to more people, you should be able to make it public, where it can stand as a work in itself.
From Commentary and Communication by Matt Baer