I guess everyone likes different things, it is impossible to satisfy every potential reader. I'm not sure what others would like to see. I'm not even close to being a writer, but here are simple and probably obvious things I'd consider for a new book.
Pick a target audience. Like age range and gender. Think about the themes and messages you want to get across. Have an intriguing plot and more interesting characters.
Have characters readers can relate with and characters no one can understand, diversity is a great thing! Someone can be LGBT+, someone can be an antihero, just do what you think is interesting.
Good luck with your writing!