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: House of Anubis
Base Breaker: Nina and Joy. The fanbase is pretty divided with a significant portion really hating Joy and quite a few Nina-haters as well. Most of the fans are still Fabina shippers though.
Broken Base: For some season 3 due to the fact that the main lead had to leave the show due to Nina leaving due to a major case of Real Life Writes the Plot and these fans were either diehard Fabina shippers or they just didn't like KT. Most of the fanbase seemed to like it through. However with the recent revelation of the current storyline possibly being wrapped up in a 90-minute movie with "series finale" written over it instead of a full fourth season, and the fourth season, if it gets renewed will potentially remove the entire cast due to the movie possibly being the end of their story arc has this trope in full force. The fact that Nina and Amber are confirmed to be not returning ever makes the backlash even worse.
Crowning Moment of Heartwarming: Patricia apologizing to Nina, followed by Nina responding that she forgives Patricia, as Nina understands that Patricia acted the way she did only because she was worried about Joy.
Fridge Brilliance: After the identity of the Osirion is revealed, it kind of makes sense that The Chosen One and her guardian would both be from the same country.
"The Chosen One and the Osiron can't be in the same place, or terrible things will happen". Real Life Writes the Plot or otherwise, it makes sense when you consider that Nina and Eddie spent all of Season 2 in the same school: Senkhara showed up days after he arrived... and she nearly succeeded in the end!
Holy Shit Quotient: We all expected mythical and downright strange things to happen as our heroes slowly solve the mysteries, as well as drama. But when Nina falls down a very long pit because of Season 2's mysterious spirit, ending on a cliffhanger... well...
It might be safe to say that Season 2 took a level in this when compared to Season 1. We have Senkhara's Reality Warper powers, the first actual on-screen death for Rufus, the Nightmare Fuel as mentioned above...
And now more than halfway through Season 3, we have Victor who's possessed by Robert Frobisher-Smythe set up a variant of an actual guillotine, which sliced through a book with ease.
Nightmare Fuel: In one of Senkhara's dream visits, she possesses Nina's sickly grandmother, who shows COMPLETELY black eyes. No irises, no pupils, no nothing but black. It's considerably creepy to look at.
The Scrappy: Joy in season 2 from Fabina shippers and invoked in universe as well by the rest of the cast and Mara in season 3 from BOTH Fabina and Jeroy shippers. Joy gets Rescued from the Scrappy Heap and in Season 3 where she is more likable and paired with Jerome after being a great friend to Mara and Willow. However, Mara gets a significant degree of hatedom for her treatment of Joy and Jerome's relationship and later ending up with Fabian despite having little to no interaction with each other.
The Woobie: Definitely Nina after Sarah dies in House of Victory and again when it's revealed that Senkhara has been slowly killing her grandmother since the beginning of season 2.