Everyone should make room for a little kitsch in their home. There is a certain humor and whimsy to it that really takes the seriousness out of everything which I think we all need from time to time.
Animal portraits are a great way to bring this in. Imagine the silly Guinea Pig below in a super ornate gold frame. It looks formal until you see that its not your great-grandfather, but a silly guinea pig.
This fancy pig would be awesome as well! I would like to find a frog or Chameleon since I love them both so much!