Well, a common trope is the 'discovery' trope. Steve might gradually discover Eddie's true vampire nature, which could lead to a lot of drama and tension. There's also the 'redemption' trope. Maybe Eddie, as a vampire, has a dark past, but through his relationship with Steve, he finds a way to redeem himself. And of course, the 'opposites attract' trope is often used, as they are likely to have very different personalities and lifestyles.
One great 'Eddie x Steve Fanfic' is 'The Unlikely Bond'. It beautifully portrays the development of their relationship from initial distrust to a deep friendship and maybe something more. It has well - written dialogues that really capture the essence of the characters.
I really like 'Steve x Eddie fanfic' like 'Hearts in Harmony'. It delves deep into their personalities and how they complement each other. The way the author writes their interactions, especially the small, tender moments between them, is just amazing. There's also 'Facing the Unknown' which is set in a post - apocalyptic world and shows how they rely on each other to survive.
A good 'Steve x Eddie fanfic' often has great chemistry between the two characters. This can be shown through their dialogue, the way they look at each other, and how they react in different situations. For instance, in some fics, when Eddie plays his guitar and Steve just stares at him with admiration, that's a great moment of chemistry. Additionally, a unique setting can make the fic stand out, like setting it in a fantasy world where they have to fight together against a big evil.
They could have Eddie teach Steve about vampire culture. Steve could then use this knowledge to help Eddie in some way, like protecting him from vampire hunters. This would strengthen their bond in a unique way.
One great 'Steve and Eddie fanfic' is 'The Unlikely Bond'. It beautifully explores their friendship development in a unique way. The characterizations are on point, making it a really engaging read.
Archive of Our Own (AO3) is a great place to start. It has a large collection of fanfics, including many for 'Eddie x Steve'. You can use the search function to filter by tags like 'Eddie x Steve', 'relationship development', etc.
One common theme is friendship turned into something more. Eddie and Steve often start as just acquaintances or friends who gradually realize they have deeper feelings for each other.
Friendship is a very popular theme. Many fanfics explore how Steve and Eddie, who seem like an unlikely pair at first, form a deep and meaningful friendship. It's about them understanding each other's differences and growing closer.
You can find Steve x Eddie fanfiction on Archive of Our Own (AO3). It has a large collection of fan - created works, and there are many talented writers who have contributed Steve x Eddie stories. Just search for the relevant tags and you'll be presented with a plethora of options.