The theme of Wrath's leadership within the Brotherhood in relation to his relationship with Beth is also common. Writers might show how his role as a leader affects his time with Beth and vice versa. For example, how he has to balance protecting the Brotherhood and loving Beth. It's a complex dynamic that makes for interesting fanfiction.
You can try fanfiction websites like Archive of Our Own (AO3). There are a large number of fan - created stories there. Just search for 'Black Dagger Brotherhood Wrath and Beth' in the search bar and you'll likely find many relevant fanfictions.
One common theme is Rhage's struggle with his inner beast. In the original series, this is a major part of his character, and fanfiction often delves deeper into how he copes with it. Another theme is his relationships, whether it's his romantic relationships with other characters or his brotherly bonds within the Brotherhood.
One common theme is their relationship development. Writers often explore how Rhage and Mary grow closer and overcome obstacles in their relationship, given Rhage's unique situation within the Brotherhood.
One of the main themes is loyalty. The Brotherhood members are extremely loyal to each other in their fight against the Lessening Society. Another theme is love and sacrifice. We often see characters sacrificing their own well - being for the sake of their loved ones or the greater good within the vampire society depicted in the novels.
Wrath is a very popular character. He's the king of the vampires and has a strong and complex personality. Another popular one is Butch. He's a human who gets involved with the Brotherhood in a very unique way.
One popular book could be 'Lover Awakened'. It has a great story with complex characters. The intense relationships between the characters really draw readers in.
Fanfictions that focus on the training regimes of the Brotherhood can also be really engaging. They can detail the intense physical and mental training that the warriors go through. This not only gives readers a better understanding of how the characters become so strong and skilled but also adds an element of action and adventure to the story.
Wrath is often a very popular character in fanfic. As the king, he has a lot of power and responsibility, which makes for interesting storylines. His relationship with Beth is also a big draw, and many fanfics explore different aspects of their relationship, like how they deal with ruling together.
An OC who is a vampire from a different clan and has different cultural values. This OC could bring new perspectives to the Black Dagger Brotherhood, challenging their traditional ways and leading to some internal conflicts as well as growth for the group.
The complex characters are a great aspect. Each brother in the Black Dagger Brotherhood has a unique backstory and personality. Their relationships, both within the brotherhood and with the outside world, add depth to the stories.