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 what aspects you like about Here's Negan. But comics like The Walking Dead, which shares a similar post-apocalyptic theme, might be of interest.
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.
Negan's presence in the comics is quite extensive. He makes his debut and remains a prominent figure throughout many storylines, influencing the plot and characters for a considerable time.
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.