Rob, I think there are people who derive genuine and honest pleasure from making more or less the same pictures over again.
I take delight in every good pot of soup I make, every good loaf of bread I bake, and it is not because I am naive, or simpleminded. Photography, alas, works somewhat differently for me.
I am passable fake in a variety of genres. I can bang out decent landscapes, still lifes, portraits, product shots. Am I good at any of them? Not really. Having got to the point where i realized that, with a year of concerted labor, I could get good at one or another of these, at the point where the path was pretty clear, I lost interest. I didn't want to make the same damned thing over and over, incrementally better, until I could make really good ones.
And yet, with soup, with bread, I am perfectly happy with precisely the same path. People are funny.
It took me most of a decade to figure out what I actually wanted to do with a camera (I think), and it involves a lot more words than I would have guessed.