I guess a lot of people are going to automatically say Jar Jar Binks, but personally I couldn't stand that pointless robot thing, General Greivous. I mean aside from the point that he walked like an ostrich, spoke like a terminal emphysema patient, and wielded four lightsabers in one of the stupidest lightsaber battles ever, he even out-Vadered Vader. And that is criminal! Part of the coolness that is Darth Vader is the fact that he is more machine than man, a virtual cyborg. Then along comes this ridiculous excuse for a character and completely negates Vader's uniqueness. Bah, General Grevious, I spit on thee!