Me, too. :D Unfortunately, most of them aren't that good. I think I'm putting too many elements into a lot of them - there's a balance to strike between too little and too much.

I think I'm going to take your "Do your favorite character in an art style like Impressionism, Expressionism, or Cubism." out of the Challenge section and make it a prompt on its own: "Do [a person] in an art style like [style], [style], or [style]." And also add things like "your favorite character," "your favorite pairing," "a character you dislike," "a pairing you dislike" and whatever other combos I can think of to the Person list.