One common theme is the struggle between Edward's vampire nature and his love for a human. It creates a lot of tension and drama.
The theme of sacrifice also appears frequently. Edward may have to sacrifice his own desires or safety for the sake of his love. This adds depth to the love story and makes it more than just a simple romance.
Another theme is the idea of eternal love. Since Edward is a vampire, the concept of loving someone forever is often explored in great detail. It can be very romantic.
One common theme is love and loss. Since Edward has such strong feelings for Bella in the original story, many fanfictions use his crying as a reaction to the potential or actual loss of her. Another theme could be his struggle with his vampire identity. His crying might be a sign of his dissatisfaction or pain with what he is.
One common theme is the idea of forbidden love. Since Emmett is a vampire, his relationship with a human or even another supernatural being can often be seen as something that goes against the norms of their world. Another theme is loyalty. Emmett is a very loyal character in the Twilight series, and this is often emphasized in love story fanfictions as he remains true to his love interest no matter what challenges they face.
One common theme is self - discovery. Since Edward was in a heterosexual relationship in the original Twilight story, in gay fanfiction, he often has to rediscover himself and his feelings. Another theme is acceptance, both self - acceptance and acceptance from others like his family. Love and passion are also common themes, just like in any relationship - based fanfiction.
One common theme is the exploration of their eternal love. Writers often expand on how their love endures through different challenges. Another theme is the power dynamics, especially considering Edward's vampire nature and Bella's human - turned - vampire state in some stories.
One common theme is the exploration of cultural differences. For example, how different holidays or traditions are shared between the characters. Another theme is the facing of prejudice. Since it's an interracial relationship in the context of the Twilight universe, they often have to deal with the stares and whispers from others.
Another theme is self - discovery. As a human, Edward has to figure out who he is without the allure and power of being a vampire. He might question his own values, his place in the world, and what he really wants to do with his life. This often leads to a journey of self - exploration and growth in the fanfiction stories.
Love in a dangerous world is also very common. The contrast between the violent and often immoral mob world and the pure love that might develop between Edward and another character makes for an interesting dynamic. For example, the main character may be initially afraid of Edward's mob ties but then falls in love with him regardless.
Love is a very common theme. Since it's about Bella as Mrs Edward Cullen, the love between them is often explored in depth. Another theme is family, as she becomes part of the Cullen family. And there's also the theme of adjusting to a new life, being a human turned vampire's wife.
One common theme is family. Since she's part of the Cullen family, the stories often explore her relationships with Edward, their parents, and other siblings. Another theme is identity. She has to figure out who she is as a vampire or as a unique individual within the family. For example, in many fanfictions, she struggles with her powers and how they define her.
The theme of redemption also frequently appears. Even if Edward has committed or been involved in criminal acts, there is often a journey towards making things right. This could involve him trying to protect the ones he loves from the consequences of his actions or trying to find a way to atone for his wrongdoings.