The contrast between them. Hermione is a studious, rule - following Gryffindor, while Draco is a Slytherin with a more self - serving attitude. Their different backgrounds and personalities create a lot of potential for interesting storylines.
One popular one is 'Manacled' which delves deep into a complex relationship between Hermione and Draco in a post - war wizarding world. It has a very engaging plot with lots of twists and turns.
One common theme is the 'enemies to lovers' trope. Since they are from different houses in Hogwarts (Hermione from Gryffindor and Draco from Slytherin), they start off as antagonists but gradually fall in love. Another theme is redemption. Draco often has to face his past actions and redeem himself in the eyes of Hermione and others.
You can try fanfiction.net. It has a large collection of fanfictions, and there are likely many great Hermione and Draco ones. Just use the search bar and type in 'Hermione and Draco' to filter the results.
It's hard to say for sure what the plot would be. It could be a really strange and out - of - character take. Maybe she's under the influence of a dark spell that makes her do something so outlandish as kidnap. But this is all speculation as this is a very odd and disturbing concept.
There are fics that focus on Snape mentoring Hermonie in a more in - depth way than in the original books. This could involve him teaching her dark arts defense from a more practical and less textbook - based perspective. Another recurring theme is the idea of Hermonie being the one to truly understand Snape's pain, especially related to his unrequited love for Lily. She becomes a confidante for him, and this forms the basis of their relationship in many fanfictions.
One great place to find Hermonie and Severus Snape fanfiction is on Archive of Our Own (AO3). It has a vast collection with different takes on their relationship. Some stories might focus on a mentor - mentee relationship that could have developed further, while others explore a more romantic angle in alternate universes. Another option is Fanfiction.net, which also has a decent number of such fanfictions, though the quality can vary more widely.
It's hard to say who the 'best' are, but some authors have really made a mark. For instance, RedHairRomance writes some really cute and fluffy stories about Ron and Hermonie. Their writing style is very engaging. Then there's SpellboundScribe, who delves deep into the magical lore and weaves it into the relationship of Ron and Hermonie in a very interesting way. And of course, there's QuillAndParchment, whose stories often have unique plot twists involving the two characters.
Well, friendship - turned - love is a big one. In a lot of fan fictions, they start as friends and then gradually realize their deeper feelings for each other. There's also the theme of them facing danger together. It could be against dark wizards or some new, unknown magical threats. And sometimes, there are themes about family, like how they would raise their own magical children and pass on their knowledge and values.