Begin with a clear concept. Maybe you want to explore Negan's backstory more deeply. Research the world of The Walking Dead to make sure your fan fiction fits within the general lore. When writing about Negan, use his signature dialogue style. He often uses sarcasm and has a certain swagger. You can also introduce a love interest for him, which could add a whole new layer to his character. Then, build a plot that has a beginning, middle, and end. For instance, start with Negan being in a difficult situation, like being captured by a rival group, and then show how he uses his wits to get out of it.
Well, there's a fan fiction where Negan teams up with a young survivor named Lucy. In this story, Negan becomes a sort of mentor to her. It shows a different side of him. Also, 'Negan's Lost Love' is a fan fiction that delves into his past relationships and how they might have shaped the man he became in the show.
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.
Rick is a very likely character to interact with Negan in hurt Negan fanfiction. Their relationship has been a central part of the original story, and in fanfiction, their interactions could be further explored, especially if Negan is in a 'hurt' state. Another character could be Carl. Carl had his own complex relationship with Negan, and in fanfiction, their dynamic could be developed in new ways.
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.