Mostly by interest on the subject, many times I upvote the headline, without reading the article. If I don't like the article or the link, sometimes I remove th

Mostly by interest on the subject, many times I upvote the headline, without reading the article. If I don't like the article or the link, sometimes I remove the upvote. My heuristic is "I would like this subject discussed on HN ; This subject deserves more exposure"