Simple one.. I like simple..forces you to look at the basics like storytelling, composition, color, space, mood.
It’s not flashy, but, I tend to think of drawing basics as the pasta that is served with the spaghetti sauce. If you JUST have the pasta( basics) without the sauce, it’s still a nutritious meal.. the sauce makes it more appealing... but if you were to have JUST the sauce without the pasta, you wouldn’t want to eat that for very long.
I know it’s kind of a weird analogy, but It works for me.. makes me work on the basics all the time.