i learned to appreciate some small ones like farming grid that makes replanting much less tedious without trivializing it, if you are looking for a challenge than the most fun way to do so is probably to look for one of the *higher starred enemies* mods (imo thats much more fun than to challenge yourself by limiting consciously like with these knife only challenges etc). for new content you should look through the list since wether it breaks your game experience is mostly a matter of perspective. gl hf