One more theme could be the idea of family among vampires. In some fanfictions, vampire families are very hierarchical and strict, while in others they are more like a group of friends. Also, the theme of transformation is common. How does a human become a vampire? What are the physical and mental changes? This is often detailed in stupide vampire fanfiction.
Love is a very common theme. Usually, it's a forbidden love between a human and a vampire. Another theme is power. Vampires are often depicted as having great power, and the fanfiction might explore how they use or abuse that power.
There are fanfictions that focus on the human - vampire relationships in a more unique way. Instead of the usual love stories, they might show how a human uses vampire powers for their own benefit. Some stupide vampire fanfiction also plays with the idea of vampires in modern day society in a very satirical way, showing how they would struggle with things like social media and modern technology.
One common theme is the struggle between good and evil. Batgirl, being a symbol of good, has to face the dark and often immoral world of vampires. Another theme is the idea of transformation. Sometimes Batgirl might be in danger of becoming a vampire herself, which adds a lot of tension.
One common theme is the forbidden love aspect. Since Peter is a vampire, there are often obstacles in their relationship due to his vampiric nature. Another theme is the power dynamic. Vampires usually have some sort of power, and how that affects their relationship with Patrick is often explored.
The theme of redemption can also be found. The vampire may be seen as a creature in need of redemption, and Hermione might be the catalyst for that change. Also, the exploration of the vampire's immortality and how it contrasts with Hermione's mortal life is a frequent theme.
Romance is a very common theme. After all, it's a honeymoon. The vampire couples usually show deep love and affection for each other.
Love and loyalty are common themes. Usually, the vampire mate bond is seen as something unbreakable, so the characters show great loyalty to each other. For example, in many stories, the vampire will go to great lengths to protect their mate.
Love is a very common theme. Usually, it's about a human falling in love with a vampire or vice versa, like in many classic vampire stories.
One common theme is power struggle. Vampires, with their superhuman abilities, often get involved in the fight for the Iron Throne or power within the different kingdoms. Another theme is secrecy, as they have to hide their true nature from the people of Westeros.
One common theme is the struggle between the vampire nature and human emotions. For example, Draco as a vampire might fight his blood - thirsty instincts while falling in love with Hermione. Another theme is the secrecy and danger. The vampire world is often portrayed as something that has to be hidden from the regular wizarding society, creating a lot of suspense.
The theme of redemption also shows up often. Since vampires are often seen as evil in many stories, Wolverine as a vampire may feel the need to redeem himself. He might try to find a way to use his powers in a positive way or find a cure to reverse his vampiric state to prove that he's still a hero despite the new circumstances.