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.
Base Breaker: The hop from 2D to CGI. While some are welcome to the change in art style and are impressed by the visuals, others would have liked to see the Animesque, Pretty Cure-styled visuals seen in the original PV.
Visual Effects of Awesome: As noted on the main page, the CG version of Miraculous Ladybug was produced for $11.5M, more than most Western productions. This has blessed the show with highly-detailed visual design, dynamic battle choreography, expressive animation and particle effects.
The video game:
Big Lipped Alligator Moment: Getting the free game by spelling S-P-E-C-I-A-L in the arcade game treated the player to ... a human wedding?!