Here is something I started a little while back.

This first one was done in 2m-3mn tops. A quick doodling kind of sketch that started the idea: a series of the same drawing done in a different style each time -10 total.
Who knows, when it's all done, I envision maybe choosing the best 9 and making one big poster with all of them side by side...

Drawing #2, done right after the first, using a ball pen: