>>24709269
I think in Discworld's case people don't read it for the plot or characters or the canvas of the world, they read it for the mood. The writing style is breezy and jovial, the tone wanders back and forth between winking irony and sincere whimsy, and if the plots stay fresh and don't repeat themselves or make convoluted twists then reading that tone and style puts people in a good mood.
I'm actually the wrong person to advertise for Discworld though. As a comedy series, I don't think it ever made me laugh out loud. It just gave me some sensible chuckles now and then.
Maybe "secretly-talented female servant at an all-male school" isn't your favorite setup, but let the record show, Your Honor, that someone managed to write it WITHOUT filling the pages with sexsexsexsexsex.