Hannibal is not supposed to be a hero or even a semi-hero in the show. He is despicable and irredeemable pretty much in all of his actions. That does not, however, keep some fans from trying to redeem him and seeing him as "not so bad". He is evil, and the show does not shy away from demonstrating that. I like him in an "OMG he is so evil, how is he doing this? I am cringing while watching him do this!" way.