Bad-ass Intro
Part of the reason why Negan is considered the biggest villain in TWD is his introduction. On his first appearance, he kills a major character in the show (name not disclosed for avoiding spoilers). He takes his weapon of choice, called Lucile, a baseball bat wrapped with barbed wire and bashes the head of this character while others watch on. Now, the show has often decided to distance itself from the comic and make its own choices, thus Negan might end up killing someone else, however, it is quite certain that someone important will die as that is primary to introducing him as the antagonist that he is.
