I was just browsing on Etsy and found these cool Macbook decal. I am definitely getting the Superman one.

Some of the links might be deal if they are sold.

Banksy Mona Lisa Bazooka Apple MacBook Decal Sticker

Pac-Man Scene

Hipster Snow White

Bloody Android Eating Apple

Superman 2

Homer Simpson

Futurama Bender w/ Gun

Beatles Abbey Road