If what we write is too predictable, we lose the audience. If it’s too unpredictable, we lose the audience. Part of a composer's prime directive (but his playful joy too) is to constantly search for a balance between "same and different."
Brief discussion of balance between predictability and surprise in new music
predictability, surprise, aesthetic balance, contemporary music, music composition
Mauldin, Michael D.. "Composing Music in the Twenty-First Century." (2017). https://digitalrepository.unm.edu/nm_composer_archive/655