Infallible signs
There are some thing which, as far as I’m aware, never appear on bad records: hammond organs, trombones, handclaps.
And, a broader category, ska covers. Why is it, by the way, that two-tone, renowned as a political form of music, got so terrible whenever it explicitly turned to politics? Lots of great tunes about the general shitness of work, poverty, late capitalism; and then when political demands get raised, you get the mediocre “Free Nelson Mandela” and “Stand Down Margaret,” the worst ska record ever made?