Currently doing some research on Metroidvania games for my own, what are some things you like/dislike about hollow knight?

I’m trying to focus a lot on what people want to play, and listening to community feedback. I want to make a game that feels really good to play, regardless of any story or art that will also be included. Tell me some things that you liked/disliked about hollow knight (or other metroidvanias) or thing that you would like to see!