I'm really a very weak musicologist. Wish it weren't so, but there's only so much you can dig deeply into in one lifetime, as if you hadn't noticed.
You repeat things because they're like your personal obsessions
As human beings we do change, grow, adapt, perhaps even learn and become wiser.
Composition has almost always been solitary.
A nice blend of prediction and surprise seem to be at the heart of the best art.
It's best to incorporate a broadly eclectic point of view, and let whatever moves you be your inspiration.