Some people write it because they want to insert themselves into the Naruto world in a more idealized way. They create a Mary Sue character who is basically a better version of themselves, with all the powers and popularity they might desire.
Some people write anti Naruto fanfiction because they want to explore different perspectives. They might not agree with the original story's direction or the character development of Naruto. So they create their own versions to satisfy their creativity.
Some people write 'Naruto womanizer fanfiction' for the fun of exploring a different side of Naruto. It allows them to break away from his traditional heroic and somewhat naive character. They can create humorous and interesting scenarios where Naruto's charm is amped up and he interacts with female characters in new ways.
Some writers do it for the sake of creating unique and unexpected plot twists. Brainwashing Naruto goes against his usual character, so it can make for a very different and engaging story.
It could be a way for fans to express their own feelings about the unfairness in Naruto's original situation. They take it to an extreme with abuse in fanfiction to emphasize their point. For example, Naruto was already an outcast in the village to some extent, and the abuse in fanfiction is like a hyper - extension of that idea.
To write a good Mary Sue fanfiction, start with a strong concept for your Mary Sue character that still has some relatable aspects. Let's say you're writing a Star Wars - based fanfic. Your Mary Sue could be a Jedi - in - training who is really good at lightsaber combat but struggles with the Force in some ways. Then, create a plot that forces the character to grow. Instead of having everyone praise the Mary Sue all the time, have some characters be skeptical or even hostile. This adds depth to the story. Also, pay attention to the world - building. Make sure your Mary Sue fits into the existing Star Wars universe in a believable way.
Some writers might be inspired by their own feelings of saying goodbye in real life. They project those emotions onto Naruto and his world. Also, it could be a way to show how the characters would grow and change if they had to part ways. For example, a writer might want to show how Sasuke would react if Naruto really left for good. They use the 'goodbye' concept to dig deeper into the relationships and personalities of the characters. This gives them more creative freedom compared to just following the original storyline.
People write 'naruto dead fanfiction' for various reasons. Some might want to explore different storylines that deviate from the original. Maybe they're curious about how the characters would react in such a tragic situation. It could also be a way to create more complex and emotional stories, as Naruto's death would have a huge impact on the entire 'Naruto' universe.
People write it because it's fun to mix two different and beloved fictional universes. Naruto and Leia are both iconic characters with their own unique traits. Combining them allows for creative and unexpected storylines.
Some people write it for the sake of creativity. They want to explore different aspects of the Naruto universe that the original story didn't touch on. By making it dark, they can create a new and unique narrative.
People write 'Naruto Neglect Fanfiction' because it offers a different take on the original story. It allows them to explore how Naruto would develop if he faced neglect.