Who's to say that the projects are incomplete if you have achieved what you wanted from them? Sounds very much complete to me, even though the final result might not be useful to anyone else.

I do the same and yet I don’t consider them complete. The activity itself is complete, absolutely, but not finishing projects could become a hard to shake off habit. I also agree, life’s short, in the end many learning experiences don’t need to be full projects, some things are good enough and meet their purpose without the need of complete dedication.

See, this is what I do all the time in my free time but nothing is ever good enough to publish because that's never the point and I know that if I do finish and publish something I might be on the hook to support it or for unforeseen misuse. I don't want that liability, but not having projects I've brought to production somehow makes me unworthy of working user stories off a kanban board.