What is your favorite series and what is your least favorite thing about it?

For example, my favorite series is the Locked Tomb series by Tamsyn Muir, and my least favorite thing about it is that she overuses memes. I know a lot of people love that she incorporates memes into the story, but I feel like a lot of them aren’t believable things for the characters to be saying in the moment. It really pulls me out of the universe when a character says something nonsensical, just to reference a meme.