But Kisame was redeemed. He was a true ninja, that was loyal to his Kage. He's most important job was to protect the information and secrets that could hurt his country/village. And he did that flawlessly. He worked for Mizukage, who was Madara. When he told Kisame that Tobi was him (Madara), Kisame even recognized him as the Mizukage. Of all the ninjas who was part of Akatsuki he never even betrayed his village/Kage. And in the end he did the ultimate sacrifice, to carry out his most important duty, protecting the information and secrets. And he could have just destroyed the scroll, but he made sure that it would reach his Mizukage.
Now tell me if that isn't a real ninja or what. And just because he enjoyed what he did, doesn't make him a monster.If you don't enjoy what you do, you're in the wrong line of work.