I like making games of different genres, as that’s more fun than making games that look alike. So far I’ve made games with the following genres:
- Puzzle
- Idle
- RPG / clone of a popular game where you capture monsters
- Infinite runner
- Platformer
Based on my experience, I would say the most difficult is making a game of a genre you’ve never made before. I think the difficult part is organising the project, and if its a project that you don’t know how its supposed to look like when finished, it will create a lot of frustration while working on it.