Originally posted by Nephthys
Yeah, a good reason why I hate him is because he's sooo much more of a dick in the books. We only see him through Tyrion and Tywin constantly shits on Tyrion.
His scenes with Arya in the second season are my favorite add ons. It adds a lot of depth to him. Also him shitting on Cersei and Joff repeatedly in the series make him far more likable.
Spoiler:
There was also his shielding of Tommen during the Red Wedding.