I hate shows that maintain one romance and don't have any character development at all. They're just dead in the water to me. Even if I hadn't read the books by the end of the season I would be tuning out because I don't want to see the same old story every week essentially which is what happens.
Bill's betrayal is a big reason I kept reading the books. His betrayal and sinking more into the background of the books opened up a lot of room for character development. Sookie matured as a woman through her various relationships, Eric's character evolved as did Sam to some degree I thought. Watching the characters grow and evolve has been fun.
But I really can't deal with watching the same old non-evolving characters every week, tension or not.