Sure. A common theme is the power dynamics in their relationship. Eric is a powerful vampire and Sookie has her own unique abilities. How they balance that in their married life makes for interesting stories. Another theme is family. How do they create a family unit? Do they have children (in some fanfictions they do in unique ways)? Also, the theme of protecting each other. In the dangerous supernatural world, they constantly need to protect one another, and this is often explored in fanfictions about their married life. There are also themes about exploring new places together as a married couple, which is really exciting to read about.
One popular theme is their adjustment to married life. Since Sookie is human (or part - fae) and Eric is a vampire, there are many differences they have to work through. Another theme is dealing with the supernatural community as a married couple. They have to face other vampires, werewolves, etc. together. And of course, the theme of love and passion in their marriage is always a big draw in fanfictions.
One common theme is self - discovery. As Sookie becomes smarter, she discovers new aspects of herself. Another theme is the evolution of her relationship with Eric. With her increased intelligence, their dynamic changes, sometimes for the better as they can communicate more effectively.
Eric might become more in touch with his human side. Sookie's love could make him more empathetic towards humans. He may start to question some of the vampire ways he has always followed. For Sookie, she could become more confident and fearless. Being married to a powerful vampire gives her a certain status in the supernatural world, and she might use this to her advantage in standing up for what she believes in.
A theme that frequently shows up is the power struggle. Eric is a powerful vampire and Sookie has her own special abilities. How they deal with power differences and how it affects their relationship is often explored. Also, themes of loyalty and betrayal are common. Their friends and enemies play roles in testing their loyalty to each other.
Love is a very common theme. Their relationship, whether it's a slow - burning love or a passionate one, is often explored. Another theme is the supernatural elements, as they are both part of a supernatural world. Danger also comes up a lot, like threats from other supernatural beings.
Power dynamics is another theme. Eric is a powerful vampire and Sookie has her own special abilities. Fanfictions play around with how these powers interact and affect their relationship. Sometimes it's about Eric protecting Sookie with his power, other times it's about Sookie using her gift to help Eric in some way.
One common theme is loyalty. Eric's loyalty to Godric is often explored deeply, and how that loyalty affects his relationship with Sookie. Another theme is the struggle between different worlds. Sookie being a human with special abilities in a world dominated by vampires like Eric and Godric. For example, in many fanfictions, Sookie has to decide whether to fully embrace the vampire world or keep her distance.
Another theme is the allure of the forbidden. Their relationship is often seen as something that goes against the norms, either in the vampire - human world or within their own communities. This adds a sense of danger and excitement. For example, in many fanfictions, they have to hide their relationship from others. Also, the theme of redemption is quite prevalent. Eric's dark nature often needs to be redeemed in some way through his love for Sookie. In some stories, he has to overcome his past deeds to be worthy of Sookie's love. This makes for some really engaging character development.
The theme of immortality and mortality is also prevalent. Godric and Eric are immortal vampires, while Sookie is a mortal human. The fanfictions often play with this contrast, like how Sookie views the vampires' eternal existence, and how the vampires see the fleeting nature of Sookie's life. It adds a layer of melancholy and urgency to their relationships.
One common theme could be the challenges they face as a couple during the pregnancy. Maybe dealing with how their relationship changes or how their families and friends react.
Love and loyalty are common themes. Their relationship is often tested, but they remain loyal to each other in many stories. For example, in some fanfics, Sookie has to choose between Eric and her human friends, and her loyalty to Eric shines through.