9 Reasons Sheldon Cooper Is The Worst Character On TV

9. Recurring Jokes

"Knock, knock, knock. Penny. Knock, knock, knock. Penny." The Big Bang Theory is full of recurring jokes that have been dragged out for way too long, yet still draw inexplicably raucous laughter. People, realise what is actually happening, just watch.

The audience are watching a fully-grown man knock three times on a friend's door. That isn't humour, that's a fully-grown man knocking three times on a friend's door.

Throw 'Bazinga', his spot on the couch, and "I'm not crazy, my mother had me tested" into the category labelled: 'move on'. These are silly little jokes that simply aren't amusing nine seasons after they first began.