I stole this link from Miss Cellania. It claims to test your personality (and a little more than that, it seems) based on your sketch of a pig.
Here are my results:
(Click on the picture to enlarge.)
I only drew the face, but I thought it was rather cute. I'm just grateful there were no connotations also attached to having a pig with no torso!
Your pig has no body: you are a hopeless daydreamer with no grasp of, or appreciation for reality.