Anything related to stereotypical concerns of single heterosexual males (e.g., how to pick up women). It will be justified as a "hack" if someone complains that it has little to do with start-ups or technology. Usually articles of that kind don't fit the "delight the mind" criterion.

A very close second is anything related to high-IQ people feeling superior to other people even if they have no noteworthy accomplishments or are social misfits. That's a more interesting issue, on theoretical grounds, and I post in (and even initiate a few of) those threads, but there are many other places online where that issue is more primary, and more likely to be discussed on the basis of the best published literature on the issue.

In some contexts, the articles on erlang are pure linkbait, usually as a response to some series of HN submissions with less relevance to computer technology.