Same here, it all depends about the target domain.
For example I'd never click a Seth Godin, Zed Shaw, or any other self-promotion writer link but the HN discussion tends to be very constructive. I always click links to Wikipedia, New Yorker, Wired, and many other good sources (from experience.)
Perhaps a feature could be a Agree/disagree vote for stories to distinguish from up-voting the HN discussion.
I agree. I use the comments thread as a secondary filter if I a. am not already familiar with the domain of the link, b. the story has a very sensational heading or c. feel it might a self-promoting link.
For example I'd never click a Seth Godin, Zed Shaw, or any other self-promotion writer link but the HN discussion tends to be very constructive. I always click links to Wikipedia, New Yorker, Wired, and many other good sources (from experience.)
Perhaps a feature could be a Agree/disagree vote for stories to distinguish from up-voting the HN discussion.