Genres of isekai:
- Villainess
- Edgelord monster MC powertrip where they brutalize everyone
- I became (insert creature and/or object) and it had no effect on the plot
- I have (insert seemingly useless power) which is actually the best power of them all
- I became a noble and fixed my country with cheat skills/perfect self
- MC gets spawned in a dungeon and has to level up and choose between options (always chooses the right option) to get out
- MC is/gets a dungeon and has to protect/manage it
- MC is overpowered but wants to live a normal life (everyone in the world is an intolerant warmonger)
- MC has a mundane power slice of life
- MC is super weak for like 3 seconds and then gets some cheat skill from a goddess or a dragon or whatever, and sometimes also befriends them
- MC has earth technology which allows them to win every time
- The world is a game MC played so they know all of the speedrunner minmax strats
- Obligatory harem story where MC collects waifus
Mix and match these for literally every isekai of the last 20 years
Even my favorite isekai bookworm is a combination of 5 and 11, what sets it apart is mostly execution
Overlord is 2 and 12
Slime is 3, 8 and 10
You get the gist