One of the most popular themes is the 'what - if' scenarios. For example, what if Harry had been sorted into Slytherin? Another common theme is exploring the backstories of the minor characters. Romance, especially between the main characters like Harry and Hermione or Ron and Hermione in different ways than in the original books, is also quite popular.
Time - travel is a really popular theme in Harry Potter fanfiction. Fans like to write about characters going back in time to change certain events. Alternate universes are also a big thing. In these, the wizarding world might have different rules, or the characters might have different personalities. And of course, there are a lot of stories that focus on the post - war era, showing how the characters rebuild their lives.
One popular theme is the relationships between the characters. For example, the friendship between Harry, Ron, and Hermione is often explored more deeply, or there are romantic relationships like Harry and Ginny's relationship developed in different ways. Another theme is alternative universes, where the events in the original books are changed, such as if Voldemort had won in the end.
There are many talented fanfiction authors. Some have gained a large following within the community. However, it's hard to name just a few as there are so many great ones. But often, those who are known for their creative interpretations of the characters and unique plotlines become popular. For example, some might focus on a particular character's growth and development in a way that the original books didn't fully explore.
One popular theme is the 'what - if' scenarios. For example, what if Harry had been sorted into Slytherin instead of Gryffindor? Another common theme is romance, like Harry and Hermione getting together instead of Ron and Hermione. There are also a lot of fanfictions that explore the backstories of minor characters in more detail.
It depends on how you define 'popular'. There are so many different types of fanfiction in the Harry Potter universe. Some concepts gain a lot of traction and are shared widely among fans, but others remain more niche. This 'harry potter is a ghoul fanfiction' might be one of those that only a small subset of fans who are particularly interested in unique or darker interpretations are aware of.
One popular theme is alternate universes. Writers like to imagine what would happen if certain events in the original series were changed. For example, what if Harry had been sorted into Slytherin? Another theme is relationships. Fans often explore different romantic pairings among the characters, like Hermione and Draco. And of course, there are also themes about the characters' backstories. Maybe a fanfic will delve deeper into Sirius Black's time at Hogwarts before he was sent to Azkaban.
Character backstories are a big theme. Many fanfictions delve deeper into the past of characters like Severus Snape. We get to see his life before Hogwarts, his family situation, and how it all shaped him into the complex character we know in the original series. Also, the exploration of different Hogwarts houses and their unique cultures is quite popular.
One popular theme is alternate universes. Writers create different versions of the wizarding world, like a world where Voldemort won. Another theme is relationships, exploring different romantic pairings for the characters. And there are also those that focus on the backstories of minor characters.
Popular themes include the origin stories of some of the magical items or places in the Harry Potter universe. For instance, how the Marauder's Map was actually created. Another theme is the inclusion of different cultures in the wizarding world. And of course, there are the darker themes where new dark wizards emerge and the characters have to face new threats, often with a new group of heroes coming to the fore.
One popular theme is the exploration of how different genders handle magic. For example, if Harry was a girl, would she use magic in a more nurturing or aggressive way? Another theme is the alteration of romantic relationships. A male Hermione might have a different kind of relationship with Ron or other characters.
One popular theme is the exploration of different character relationships. For instance, there are many fanfictions that focus on the friendship between Harry, Ron and Hermione in more depth. Another theme is the creation of new adventures for the characters outside of what was in the original books.