One common theme is loyalty. Their loyalty to each other is a big part of their relationship and is often explored in fanfics. For example, Bucky always being there for Steve, and Steve never giving up on Bucky.
Friendship that turns into something more is also a common theme. They start as best friends from Brooklyn, and in many fanfics, their relationship evolves into a deeper, more romantic connection, which is really appealing to a lot of readers.
One common theme is the exploration of their relationship in an alternate universe. Since Steve is female in these fics, it often changes the dynamics of their friendship and potential romance. Another theme is how they deal with the challenges of the Marvel universe together.
One common theme is loyalty. Since both Bucky and Steve are known for their loyalty in the Marvel universe, in poly fanfics, this loyalty extends to their poly relationship. They are always there for each other no matter what.
One great Steve Rogers x Bucky Barnes fanfic is 'The Long Road Home'. It beautifully explores their relationship, from their early days in Brooklyn to the complex situations they face after all the superhero stuff. The characterizations are really on point.
Some fictions center around their trust in each other. Despite all the chaos and mind - control, they always find a way back to trusting one another. Another common theme is the idea of second chances. Bucky gets a second chance at life and at being a hero, and Steve is always there to support him. There are also stories that play with the concept of an alternate universe where their relationship might develop in different ways, like in a world without war or super - powers.
One of the most popular themes is friendship. Their bond, which has endured through so much, is often explored in fanfiction. It could be about how they support each other through tough times. Another theme is redemption, especially for Bucky. Since he was the Winter Soldier and had done things he wasn't in control of, many fanfictions focus on his journey to find redemption with Steve's help.
I really like 'A Bond Unbroken'. It shows the unwavering bond between Steve and Bucky. The author does an amazing job of portraying their loyalty to each other. In this fanfiction, they face various challenges together, which only strengthens their relationship. There's also 'The Lost Memories', which is a unique take as it deals with Bucky slowly regaining his memories and Steve being there every step of the way, guiding him through the process.
One great fanfiction could be 'The New World' where female Steve Rogers and Bucky Barnes are reunited after a long time. Their relationship is explored in a post - apocalyptic setting. It delves deep into how their past friendship turns into something more romantic. The story also has great character development for both of them.
One popular theme is friendship. Despite the gender change, their deep bond remains a central focus. Another is adventure, with them facing new challenges in a different way than in the original story. And of course, there's the theme of loyalty, as they are always there for each other no matter what.
A common theme is 'culture clash'. Since Hermione is from the wizarding world and Steve and Bucky are from different eras in the Marvel universe, there are a lot of differences in their values, beliefs, and ways of doing things. Fanfictions often explore how they overcome these differences to work together.
One great fanfiction is 'The Winter Soldier's Redemption'. It beautifully portrays the complex relationship between Bucky and Steve. It shows how Steve is determined to help Bucky recover his true self from the brainwashing. The story has a lot of emotional moments and great action scenes that are true to the characters' natures.