These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Hilarious in Hindsight: One American publisher completely got the wrong end of the stick and mentioned something about a football team in the synopsis (apparently a misunderstanding of the Morris Men). Pratchett dryly remarked that football was one subject he'd never write a Discworld book on. Years later, cue Unseen Academicals.
The description of the Elf queen's true form - triangular face, huge eyes, tiny mouth and nose - sounds rather similar to that of an anime character.
Recycled Script: The childhood connection between Esme Weatherwax and Mustrum Ridcully seems to be based on the one between Esme and Cutangle in Equal Rites (of course, like all early senior wizards in the series, Cutangle has presumably long since been assassinated).