This is a bit of a weird request, but please bear with me I've read so many series now that I can't remember anything specific, but I know I've felt this feeling. It's when the MC starts out weak and the story paints a picture of the world that makes you REALLY excited for the MC's growth. You want to see him become OP in this kind of world. This is true for basically every xuanhuan and level system story, but there are some that really crank this up to 11. You get super pumped to see the MC's rise because you want him to become an expert in the world that's been introduced or foreshadowed. Can you suggest some weak-to-strong stories that made you feel this kind of anticipation, moreso than most? EDIT: I should add that I'm looking for a world that makes you want to see the MC become a superexpert in it, not purely a world with good worldbuilding.