I like working on commercials once in a while. They feel like a mini movie at best, they have a definite time frame, still wanting to tell an epic story - plus there always is a quick turn around.
Lately I have not had much extra time to take on commercials. More than a year ago I did this story pitch for a Danonino commercial, which was fun to do (I dont think anything ever came out of it in the end though).