Okay, not that I like Buffy or Angel, but I have to admit, without it (albeit through Dragonball Z Abridged), I wouldn't have my best conversation stopper.
Wanna know what that is?
"What have you been doing since you stole that antique TARDIS of yours, since you first landed on Skaro? Shouting 'Look at me!!! I'm not fighting a war!', while you battle the Daleks all the way through space and time."