Jamie and the Hound (hoping to see him next episode) have the most interesting story arcs to me. Hell, you could throw Theon in there too, as there has to be redemption at some point, right? The entrance of the horde coming over the hill followed by the dragon has to be one of the coolest sequences in a show I've ever seen.
I got to agree about the Hord and dragons coming over the hill....what a scene!!!