Previous translations used to be adapted to the context of Hong Kong readers, but nowadays many are just literal translations. The sense of "localization" and intimacy has been lost.
For a 5-year-old, 《Pokémon》 and 《Sumikko Gurashi》 are both suitable! I'd also recommend adding 《Ojamajo Doremi》 - it's very educational but not too childish. I learned a lot of lessons from watching i
Old anime OPs are also great for KTV! Like "Get Wild" from City Hunter and "Ai wo Torimodose!!" from Fist of the North Star.
"MONSTER". The suspense and tension of the entire work are greatly diminished once you know the ending. I want to experience that sense of unease again.
Siblings in different times and spaces? It seems like a similar premise to "Your Name," but with a different angle of approach.
It aired on TVB in the 2000s... it's a bit like "MegaMan NT Warrior"? But that one wasn't about collecting stones.
Nowadays, AirPods + Privacy Screen is the standard setup for sneaking in some catching up.
Oyasumi Punpun is a work that requires mental preparation before reading. Going in without any prior knowledge is the most important thing.
Additional nomination: Gintama: The Final. The humor of the TV series and the seriousness of the movie form a perfect contrast.
Many OPs from old anime are classics. I can still sing "Kimi ga Suki da to Sakebitai" from SLAM DUNK even now.