This makes me think of how fun it would be to have some sort of service that would show you your own past code and see if you'd rate it good/bad. Then you could

This makes me think of how fun it would be to have some sort of service that would show you your own past code and see if you'd rate it good/bad. Then you could correct what you think is bad, and it'd be fed right back into the corpus. Leveraging some kind of spaced repetition approach, it could be an interesting experiment to measure the way you grow, change, improve, and regress as a developer.