Before Edward left, I did not like Billy. He was so cold toward Bella and Edward, and I didn't like him for that. I started to like him more in NM because he was kinder to Bella after Edward left, but I didn't like the reason that he was being nicer (the lack of Edward). When Edward returned, and the wolves and the vampires made their sort of peace, I started to really like him. He was nicer and understanding, and just much cooler. I always feel bad for him, though. Overall, he's pretty cool.