Having done plenty of art myself, I wouldn't pick anything super hard to draw or complicated for an afterword. I'd have no energy or will left.Sometimes I marvel at how aimless, humble and self-deprecating all these mangakas seem, in all their afterword segments.
Always with the self-representation of some chibi mascot, mollusc, bug or one time, literal poop, I just, I don't know, If I could draw like them I would choose something else 😁