A great 'harry gets adopted fanfiction' idea could be that he is adopted by a Muggle family who are actually descendants of a squib. They know about the wizarding world but are living in the Muggle world. This would give Harry a chance to see how the two worlds can co - exist in a more harmonious way within a family unit.
One interesting plot could be that Naruto is adopted by a powerful and kind shinobi from another village. This new family could teach Naruto different jutsu and a new way of life, changing his perspective on the ninja world. For example, if he's adopted by a Waterfall Village shinobi, he might learn their unique water - based techniques.
Well, in certain 'harry gets saved fanfiction', Hermione might use her vast knowledge of magic in a completely new and unexpected way to save Harry. She could combine different spells and charms that no one has thought of before. Also, there could be fanfictions where Neville, having grown in confidence and power, is the one who saves Harry from a life - threatening encounter with a dark wizard.
One interesting 'harry gets summoned fanfiction' could be where he is summoned to an alternate magical realm. In this realm, he has to face new challenges and enemies that are different from what he encounters in the original Harry Potter world. For example, he might have to deal with a powerful dark wizard who has unique and strange magic.
Well, in this kind of fanfiction, Harry might finally experience a loving and stable family life. The Grangers, being intelligent and kind - hearted, could help Harry with his studies a great deal. They might introduce him to a different world of knowledge and culture that he didn't have much exposure to before. Also, he would be away from the Dursleys' abuse, which is a huge positive change for him.
One interesting plotline could be Harry growing up in a completely different magical family and having to adjust to their unique traditions. For example, if he was adopted by a family of potion - makers, he'd have to learn their special techniques.
Another plot could involve Peter being adopted by a family with their own set of secrets. Maybe they are part of a secret organization and they see potential in Peter's abilities. As a result, they train him in different ways that complement his Spider - Man skills.
The Weasleys are very common. Given their big hearted nature and their closeness to Harry in the original story, it makes sense for them to adopt him in fanfiction. They already treat him like family, so it's a natural fit.
One interesting story could be Harry getting a tattoo that represents his connection to his parents. Maybe a stag for his father and a lily for his mother. It could be a way for him to carry their memory with him in a more permanent and visible way.
In this kind of fanfiction, one possible scenario is that Harry's whole view of the wizarding world would be warped. Voldemort might try to mold Harry into his own image. He could teach Harry dark magic instead of the traditional magic taught at Hogwarts. Harry might grow up with a completely different set of values and powers, which would surely change the whole dynamic of the fight against good and evil in the wizarding world.
In this kind of fanfiction, Harry might grow up in a very different environment. Poppy is a healer, so she could potentially raise Harry with a great deal of medical knowledge. He might learn about healing spells and potions from a very young age. Also, Poppy's kind nature would likely give Harry a more nurturing upbringing compared to his life with the Dursleys.