One popular theme is the 'what - if' scenarios. For example, what if Harry had been sorted into Slytherin? Another is exploring the backstories of minor characters, like Neville's family history. And of course, there are many love - triangle stories involving the main characters, such as Hermione being caught between Harry and Ron in different ways.
You can start by looking on fan - fiction platforms like FanFiction.net or Archive of Our Own. They have a vast collection of Harry Potter fan fictions. Just use the search function and type in relevant keywords.
Family bonds are a major theme. These fan fictions often focus on the connection between Harry and his father, even though they are separated by time. It could be through memories, magical inheritances or the influence of James Potter on Harry's friends. Also, heroism is a theme. Since James Potter was part of the original Order of the Phoenix, his heroic deeds are often explored and how Harry is influenced by that.
One popular HP adult fan fiction could be those that explore the post - war lives of the characters in more mature ways, like how they deal with the traumas and build new relationships. However, it's important to note that such content might not be officially recognized and can vary greatly in quality.
Trauma and recovery. Characters are often dealing with past events that have left them scarred, and the fictions show their journey to heal.
Power and responsibility are also common themes. The characters inherit not just power from their elven side but also the responsibility to use it wisely. Also, there's often a theme of isolation. Because their inheritance makes them different, they may feel alone among the regular wizards at Hogwarts. For example, in some fan fictions, the elven - inherited characters have to hide their true nature to avoid being ostracized.
Another theme is the power struggle. Both Harry and Riddle are powerful in different ways, so fan fictions might focus on how they compete or cooperate in terms of magic and influence. For example, they could be forced to work together against a new threat and how that changes their relationship.
One possible theme could be family bonding. Mothers in the Harry Potter series play important roles in holding the family together, and dinners are often a time when families gather. So, stories might focus on how these moments strengthen family relationships among the wizarding families.
Since I'm not familiar with 'snarrt' specifically, in general for love potion Harry Potter fan fictions, a common theme is the misuse or misinterpretation of love. Love potions can create false attractions, so stories might explore the moral implications of using them. Another theme could be the chaos that ensues when characters are under the influence of love potions.
A typical theme is the idea of sacrifice. In this type of fan fiction, a character might have to sacrifice something important in order to break the unwanted bond. It could be their relationship with someone, a magical ability, or even their own safety. There's also the theme of redemption. The character or characters who caused the unwanted bond might seek redemption through helping to end it. And of course, there's the overarching theme of magic itself. The unwanted bonds are often created through magic, so the story might explore different aspects of magic, like its limits and how it can be manipulated to break the bond.
One key theme could be power dynamics. In this fan fiction, the idea of witches being slaves might explore how power is misused or controlled within the Harry Potter universe. It could also touch on themes of oppression and resistance.