Well, one possibility could be that Harry grows up with a much darker and more intense family environment. Snape, being who he is, might be strict but also secretly protective. Harry could learn a lot about potions and the Dark Arts earlier than in the original story, which would shape his magical abilities in a different way.
In a fanfiction where Harry Potter is adopted by the Snape family, it would be a whole new world for Harry. Snape's home is probably filled with old books, potions ingredients, and a sense of mystery. Harry would grow up seeing Snape's love - hate relationship with his father through Snape's eyes. This could lead to Harry having a more nuanced view of his own family history. Academically, Snape would push Harry hard, especially in Potions. Harry might also inherit some of Snape's aloofness, which would change his interactions with his friends like Ron and Hermione. Moreover, Snape's connection to the Dark Arts could expose Harry to both the dangers and the knowledge hidden within that area of magic at a younger age.
One possibility is that Snape would be extremely strict with Harry. He might force Harry to study Potions intensively, but also secretly protect him from the Dark Arts threats that lurk in the wizarding world. Since Snape has his own complex past and feelings towards Harry's father, this adoption could be filled with emotional turmoil for both of them.
His character would become more reserved. Growing up with Snape, he'd be influenced by Snape's brooding nature.
Well, the plot could start with Harry being found by the mafia after some sort of accident or escape from the Dursleys. The mafia, seeing his potential and his lack of a proper family, decides to take him in. They would train him in their ways, which could include things like combat and stealth. Harry might then have to navigate between the mafia's underworld and the wizarding world, trying to keep his two lives separate while also using his new skills to fight against the Dark Lord.
Well, it could be really wild. Maybe Hellboy would teach Harry some of his unique combat skills. Harry might grow up with a different perspective on magic and the supernatural world, influenced by Hellboy's more physical and brute - force approach to dealing with threats.
Well, he might grow up with a very different cultural influence. Maybe he'd be into American football instead of Quidditch at first. He could also have a more outspoken and confident personality, like many American characters are often portrayed.
Well, in such a fanfiction, the plot might involve Hecate seeing Harry's potential not just as a wizard but as someone with a special destiny related to the magical world at large. She adopts him and begins to train him in her own brand of magic. This could lead to conflicts with the Ministry of Magic as they might see Harry's new powers as a threat. Also, Harry could use his newfound knowledge to better understand the Horcruxes and find a way to defeat Voldemort more quickly.
Well, one possibility is that Harry would grow up with a very different set of values. The Malfoys are known for their pure - blood supremacist views. But perhaps, deep down, Harry could influence them to be a bit more accepting. He might learn dark magic quicker than in the original story, but also struggle with his own sense of right and wrong as the Malfoy values clash with what he feels inside.
Well, one possible plot could be that the OC family has some unique magical abilities or traditions that they introduce Harry to. For example, they might be experts in a particular type of magic that Hogwarts doesn't teach much about, like ancient rune magic for healing. The family could also have a different view on the wizarding world's politics, and through them, Harry gets a more well - rounded understanding of the magical society.
Well, it could be that the OC (original character) family is a powerful wizarding family. They might take Harry in because they sense his special nature. Maybe they teach him unique magic that he wouldn't have learned at the Dursleys or Hogwarts. They could also introduce him to a different side of the wizarding world, full of their family's traditions and secrets.
Well, he might learn some cool driving skills from the Toretto family. They could teach him how to handle a fast car, which would be a really different skill compared to his magic. And he could use his magic in a new way to help the family in their dangerous situations.