I fiddled with the idea behind Leonardo the Terrible Monster for over 10 years, transmorgafying from a sketchbook to a little bad wolf before becoming the book.
Meanwhile Elephant and Piggie came to me rather quickly (I'd been absentmindedly drawing elephants for a year or so before the idea for the series suddenly popped into my head).
Here are some sketches from a story I was (am?) working on about an old ball player.
Maybe it'll come together in 2013...