Cyberman: Daleks, be warned; you have declared war upon the Cybermen. Dalek: This is not war. This is pest control! Cyberman: We have five million Cybermen. How many are you? Dalek: Four. Cyberman: You would destroy the Cybermen with four Daleks? Dalek: We would destroy the Cybermen with one Dalek! You are superior in only one respect. Cyberman: What is that? Dalek: You are better at dying!
Sorry, was just watching this and thought this quote did a good job of expressing the essence of the dalek.