The user comments were mostly positive (1300 upvotes, 400 downvotes), and the site made a reasonable amount of money from the traffic, but the service was not compelling enough for people to use it daily. That's my fault, though, not Reddit's.
A "good" reddit submission is a bad article that makes the rest of your blog look iffy. 30k hits in a day, zero registration.
Seriously, if you want to make a good reddit submission, take an inflammatory/biased/extreme opinion pieces or research and quote the most provocative part of it as the title of your submission. Almost a whole paragraph.