For the "family portrait" theme, my photographer husband gave me the great idea of doing kid's faces, making all the expressions besides smiling when pictures are being taken - eyes closed, fake smiles, etc. I had a lot of fun drawing a bunch of different exasperating children.
This was a tough contest to try to do something actually usable as a surface design, and not just a repeating illustration. (I don't consider myself to have succeeded in this regard either!) My entry just made it into the top quartile - not too shabby. The entry I liked best was this very cartoony one, which I could see being used for kid's pajamas or the like.