There are definitely some great ones. Some focus on the characters' careers or personal growth, while others introduce new magical challenges. Just search on popular fanfiction websites and you'll discover plenty.
The 'harry potter is royalty fanfic' will probably have a different social structure. The original series had a clear structure based on blood status in the wizarding world (pure - blood, half - blood, muggle - born). In the fanfic, there will be an added layer of royalty. This means that there could be new forms of discrimination or privilege based on royal blood as well as magic blood. There could also be new types of magic associated with royalty, like magic that is only accessible to those of royal bloodline, which is a significant departure from the original series.
Well, it has the arcana elements which the original series doesn't. This makes for a different kind of magic and a different set of rules.
The main difference is the concept of oath - breaking. In the original series, loyalty and oaths are important but not explored in this 'oathbreaker' way. In the fanfic, characters might take actions that go against their previous commitments, which is a big deviation.
In an 'obscurus harry potter fanfic', the rules of magic can be bent more. The obscurus can give Harry abilities that are not in the normal wizarding world. For instance, he could have the power to manipulate time in a small area around him when the obscurus is active. This is very different from the original series where time - turning was a very restricted and complex magic.
It differs in many ways. In the original series, the story follows a set path, but in 'defiance harry potter fanfic', the author can take more liberties. For example, the fanfic might change the alliances or the motives of the characters. Maybe some characters who were enemies in the original become friends in the fanfic.
Not at all. The 'Harry Potter' series is about magic, friendship, and the fight against evil. Harry and Hermione's relationship is an important part of that, showing a strong bond of friendship. A sadistic relationship in fanfic is a distortion of the characters and the overall theme of the series, and it goes against the spirit of the original work.
Not sure. To determine if 'After' is based on a Harry Potter fanfic, we'd need to analyze the plot, characters, and other elements to see if there are clear parallels.
In the original series, Harry doesn't kill Umbridge. So this fanfic takes a very different turn right there. In the original, Umbridge is eventually removed from Hogwarts in a more traditional way, through the combined efforts of the students and the return of Dumbledore. But in the fanfic, Harry taking her life is a huge deviation from the non - violent and more rule - abiding nature of the main character in the original series.
The fanfic may have a different plot focus. While the original series focuses on Harry's fight against Voldemort, the fanfic could center on Harry's personal growth in other areas, like his academic achievements or his relationships with less - known characters. Also, the fanfic author might introduce new characters that don't exist in the original. These new characters can bring fresh perspectives and storylines to the wizarding world.
It should keep the magic system consistent. For example, if a spell works a certain way in the books, it should work the same in the fanfic. Also, the personalities of the characters need to be similar. Cho Chang was a bit shy and intelligent, and Harry was brave and impulsive at times. Keeping these traits intact is important.