For me, especially as someone who likes to write, animorphs and battle Royale are definitely up there. While I loved animorphs for the sci fi and the animals and the action scenes, I grew to appreciate the darker aspects that I had missed when I first read the series.

The same can be said for battle Royale, although it's how the characters behaved that helped influence how I write my own characters to an extent m also it made me love third person as my preferred POV.

There's more but I'm trying to watch TV too haha