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: Nurse Angel Ririka SOS
Cliché Storm: Magical girl? Check. Love interests? Check. Monster of the week (or bishounen, in this case)? Check. Magical kingdom ruled by a queen? Check. Supposedly evil love rival who will do anything to thwart the lead character's interest in said romantic interest? Check. Despite all of this, it's still pretty good...but then the final episode happens and stomps ALL OF THESE INTO THE GROUND. VERY VERY HARD
Ear Worm: The the dance-y first opening, for one. There is a lot of good background music throughout the show as well. The soundtracks command high prices on the secondary market.
Growing the Beard: Status Quo Is God for the first chunk of the show, but after a while (around the point when Kanon dies) this stops being true. Events in the show aren't just fun and games anymore; there are lasting consequences.