1. Harvey: The 6'3.5" tall white rabbit who befriends social outcast Elwood (Jimmy Stewart) is a mischievous fairy fond of eccentrics, brought on by a few too many martinis. He is also a kind of spiritual godfather to Bianca the sex doll in Lars and the Real Girl. Thankfully Steven Spielberg is staying away from him.
2. Steve Martin's stand-up headgear: My favorite emblem of silly. I can just see the ears bouncing up and down while he plays a particularly rousing banjo number.
3. The rabbits of Lost: With all kinds of floating allusions to Alice in Wonderland, Watership Down and Of Mice and Men, the rabbits were everywhere. My favorite was number 8, used by Ben to play mind games with Sawyer. Mostly because I loved a good Sawyer-centric episode.