Well, just based on that title alone, it's difficult to determine its quality. There are so many aspects that make a Harry Potter fanfic great. For example, it could explore new relationships between the characters, or create exciting new magical adventures. But we don't know if 'skull is harry potter fanfic' does any of those things. So, it might be good, it might not.
I'm not sure specifically if a fanfic titled 'harry potter harry is burning up' is popular. There are thousands of Harry Potter fanfics out there, and popularity can vary greatly. It would depend on how well - written it is, how unique the plot is, and how it's been promoted within the fan community.
I'm not sure if it's popular. There are so many fanfics out there, and without more information or a broader fan community's input, it's hard to determine its popularity.
Well, it depends on the specific fanfic. Some fanfics might portray Harry as an assassin, while others could have him in completely different roles. There are countless interpretations in the fanfic world, so we can't say for sure without looking at the particular story in question.
I don't think it's a very common type. Most 'Harry Potter' fanfics tend to focus on the magical adventures, the relationships between the main characters like Harry, Ron and Hermione, or exploring different magical elements in the wizarding world. While there are some that might delve into darker themes, the idea of Petunia abusing Harry isn't as mainstream as other topics in the fanfic community.
I'm not sure if it's common. There are so many different types of fanfics in the Harry Potter fandom. Some focus on relationships, others on new adventures. While metamorph - related ideas are interesting, it might not be as common as, say, romance - centered fanfics.
It's probably not a popular genre within the Harry Potter fanfic community. Fanfic writers often draw inspiration from the original series' themes of friendship, courage, and magic. Forcing obedience on a character like Harry, which goes against his strong - willed nature in the books, is not a theme that would resonate with most fans. There are so many other aspects of the Harry Potter universe to explore in fanfic, such as the backstories of minor characters or alternative endings to the main story, that are more likely to attract readers and writers alike.
I have no idea if it's popular. There are so many fanfics out there, and just from this title alone, it's difficult to gauge its popularity. It might be a niche fanfic that only a small group of people who are really into the specific fandom or the unique concept it presents are interested in.
I'm not sure if there are many fanfics with this exact concept. It could be a very unique and interesting take. Maybe in such a fanfic, Harry's wizarding world and Medusa's mythological realm collide in some unexpected ways due to their 'separated at birth' connection. It might explore how their different powers interact and how they come to terms with their strange relation.