Well, Negan's back story reveals that he had to navigate through a chaotic world, facing losses and hardships that made him the way he is. He struggled to survive and gained power through brutal means.
One key element is his leadership of the Saviors. Another is his use of Lucille as a symbol of his power. Also, his idea of ruling over other communities.
Well, Negan's back story is quite complex. He emerged in a post - apocalyptic world filled with chaos. He believed in a survival - of - the - fittest ideology. He started building his group, the Saviors, by recruiting people who were desperate or feared him. He established a system where other communities had to pay tribute to him. His actions were often cruel, like when he would kill people to make examples. But he also thought he was doing what was necessary to keep his group alive and in power.
Well, Negan first appears in the series as a major antagonist. He has a very distinct personality. He's confident, often to the point of being cocky. His group, the Saviors, would extort other communities for resources. He uses fear as a tool to control those around him. His actions have a huge impact on the other characters in the show, like Rick and his group.
One major event was his first encounter with Rick's group. He brutally killed two of their members, which set up a huge conflict. Another is when Rick's group finally decided to fight back against the Saviors led by Negan.
Well, it depends on your perspective. But generally, Negan is considered bad in the comic because of his cruel and violent actions towards the main characters.