What is your favorite Atari 2600 game?

Everyone has their own personal favorite when it comes to Atari 2600 games. Is it Adventure, Looking for the key to the Castle while fearing the attack of the Dragon? Or maybe it is Space Invaders with their relentless marching attack. Some may even love E.T., The game credited with destroying the entire Home Videogaming market.

What ever the game may be and for what ever reason, I want to know what it is. Just post your answer in a comment at my MYSPACE PAGE.