My best answer?
What we hear comes from our education and cultural experiences. So, more education more cultural experiences=more imagination. And, putting in the time on the piano bench over a lifetime.
You've got to learn your instrument. Then, you practice, practice, practice. And then, when you finally get up there on the bandstand, forget all that and just wail.
I'm a professional pianist and music educator in West Toronto Ontario. I'm also a devoted student and teacher of the drums.