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.
YMMV: Girls Next Door
Cargo Ship: Sarah and her pillow of face burial. Acknowledged by Pika herself here.
Memetic Mutation: The Poultry Coup aka The Glorious Chikin Revolution! VIVA LA CLUCKIN' REVOLUCION!! (If you don't know what this is you obviously don't read this comic)
More Popular Spin-off: of Roommates. This isn't much of a YMMV trope here: A regular Roommates page gets around 100-150 individual comments, 6-7000 views and 350-400 favorites in about two weeks in the case of GND this is 350-400, 15-20000 and 900-1000 respectively.
Ship Tease: Other than the more-or-less canon Jareth/Sarah, there's some vague, if consistent, Erik/Sarah floating around.
Base Breaker: A less extreme example is their voice-actor for Jareth, who gets intense fangirlsquees (and occasional marriage offers) from a big part of the audience and a meh from the others (the most common criticism is that while his voice is sexy but his acting in the role sounds exactly the same in every situation, which is weird as his rendition of Darkness doesn't seem to suffer from this).
Ensemble Dark Horse: Several fans (and the original author) love the voice-actress of Jadis more than any other.