Television's Worst Couples

George and Izzie, Grey's Anatomy

George and Izzie were great when they fought about buying tampons, drank tequila, danced around at parties together and counseled each other through love-life crises. They were not great when they had their tongues down each other's throats. These awesome best friends were just unnatural and forced as a couple, and luckily, the writers ultimately figured that out.