One great fanfiction idea could be the Dragonborn Vampire Lord's struggle to maintain his humanity while dealing with the thirst for blood. He might have to make tough choices between using his vampiric powers for good or succumbing to the dark desires that come with being a Vampire Lord.
A plot could center around the Dragonborn Vampire Lord's search for a cure. He might hear rumors of a powerful artifact or a wise mage who can reverse his vampirism. Along the way, he meets other vampires who either try to persuade him to embrace his new life or are jealous of his power. He also has to deal with the normal threats in Skyrim like dragons and bandits while trying to keep his vampiric nature a secret from those who would hunt him.
Well, the allure lies in the unique combination of two very powerful and distinct identities. The Dragonborn is already a sort of chosen one with great power, and adding the vampire element just amps up the cool factor. It can create stories full of moral dilemmas, like whether to embrace the vampiric side for more power or resist it to stay 'good'.
One great fanfiction idea could be a Vampire Dragonborn who struggles to control their bloodlust while on a quest to save Skyrim. They might face unique challenges as both a vampire and a Dragonborn, like being shunned by some townsfolk but still having to use their dragon powers to defeat powerful foes.
The theme of isolation is also quite prevalent. In Skyrim, being a vampire is not always accepted, and as a dragonborn, they are set apart already. So, they often face loneliness. Also, redemption is a theme in some fanfictions. The vampire dragonborn may try to atone for their vampiric deeds while still using their powers for good in Skyrim.
One common theme is the struggle between vampiric nature and humanity. The OC vampire assassin often has to deal with their bloodlust and how it affects their actions and relationships. Another theme is the use of stealth and assassination skills in the Skyrim world. They have to be sneaky to survive and complete their missions.
There's also 'A Vampire's Tale in Skyrim'. This fanfiction delves deep into the world of Skyrim as seen through the eyes of a vampire dragonborn. It explores how their vampiric abilities interact with their dragonborn powers. For example, their enhanced senses as a vampire can sometimes be a hindrance when trying to use dragon shouts. It's a really interesting read.
I also like 'The Blood - Soaked Assassin of Skyrim'. In this one, the OC vampire assassin has a complex relationship with the different factions in Skyrim. It delves deep into their moral struggles as they kill for survival while also trying to maintain some semblance of humanity. It's a very engaging read.
One idea could be that the male vampire dragonborn struggles with his dual nature. He has the power of the dragonborn but also the thirst for blood as a vampire. For example, he might face a moral dilemma when using his dragon shouts to save a village that is afraid of his vampiric side. Another plot could involve him seeking a cure for his vampirism while still trying to fulfill his destiny as the dragonborn. He could travel to ancient ruins in search of a lost spell or artifact that might reverse his condition.
One idea could be Naruto being turned into a vampire lord against his will. He then has to struggle with his newfound vampiric instincts while still trying to protect the Hidden Leaf. Maybe he forms an unlikely alliance with some of the village's outcasts who are more accepting of his new state.