I have made several characters, but only had the chance to play one campaign of it. It was a fairly long and very enjoyable game, however. I was obsessed with Makai Kingdom at the time, so was basically playing as Lord Zetta. Yes, an overlord trapped in a book. He was a master of disguise: he kept spare dust jackets for other books.
But I made all kinds of wacky characters: someone who telepathically tells Tibetan butterflies to flap their wings in just the right way to make small hurricanes wherever he needs them (flight, "telekinesis", tornado attacks), a London copper (complete with the stupid phrases. Forces people to spill the details of their plot, except blaming it on "Bazza and Gazza" instead, and can freeze people's feet in place) and a few other oddball ideas.
It's very fun for that, really.