Merle Dixon. He’s the character Walking Dead fans love to hate, but the man who plays him, Michael Rooker, insists that Merle is simply misunderstood. According to Rooker, Merle is a positively delightful individual who did nothing wrong on that roof before he was handcuffed and left to die back in season 1. Who knows? Maybe he’s right, because when I went on set for an upcoming season 3 scene, the residents of Woodbury could not stop chanting his name — “Merley! Merely! Merely!” — over and over…