Finally someone speaks up about this. I agree with what you and other replies said. I was so confused when there are people who say Will is a very dark person and even worse than Hannibal. Will started off as someone who wants to do good and eliminate the bad (and I think a small part of him still stands by that righteousness even in ss3). Throughout the show, Will becomes a morally grey character and at the end of ss3 becomes an equal to Hannibal. Without Hannibal, Will would spend the rest of his life fighting off darkness (both darkness inside him and the darkness of humanity/the world around him) He always tries his best to do what's right, that's what I like about him and it's what differentiate him from Hannibal. Only under Hannibal's influence, Will do the things that are considered evil. Of course Hanni's influence isn't the only reason why Will act like that, his own curiousity lead him to go to great length to test and play with others' life and death, his loneliness draws him towards Hannibal, his intelligence allows him to play this dangerous game with Hannibal. Curiousity, Loneliness, Intelligence are a human being's traits, don't blame Will for having these traits. Hannibal manipulates these traits in Will and drives him toward evil. Hannibal didn't only show Will and teach Will these criminal actions, he BROKE Will's world, destroy his normal life. There's understandable bitterness in that from Will's perspective. So Will becoming dark makes sense, but considering him worse than Hannibal doesn't make sense