When I first got enough reputation to review the queue, I had no idea how to use my new "powers". I had the hardest time understanding when I should "Recommend Deletion" for the "Low Quality Posts".
On most sites, most answers in the queue are clearly low-quality or non-answers that have zero or negative scores. However, on this site, the answers there tend to be more substantive, sometimes having positive votes (preventing me from voting to delete directly), and generally older rather than newer.
When should users be recommending deletion of answers, or if they have enough reputation, voting to delete answers with non-positive scores?