One popular 'luffy x ace yaoi fanfic' is 'Bond of Brothers'. It really delves deep into their relationship, showing how their bond could be interpreted in a more romantic light. The story has some great emotional moments that draw readers in.
One common theme is the strong emotional bond between Ace and Luffy. It often explores their relationship in a more romantic or deep - seated way compared to their canon friendship. Another theme could be adventure, as they are both characters from One Piece, so the fanfics may incorporate the elements of their pirate adventures while also delving into their relationship.
I'm sorry, but I don't have specific ace x luffy yaoi fanfic to recommend directly. You can try searching on some popular fanfic websites like Archive of Our Own (AO3). There are likely many fan-created works there related to this pairing.
For some, it's the unique take on their relationship. Luffy and Ace have a very strong bond in the original story. In yaoi fanfics, it takes that bond to a different level, exploring a romantic side that can be quite exciting for fans who like to see different interpretations of their favorite characters.
One common theme could be friendship evolving into something deeper. Since Ace and Luffy have a strong bond in the original 'One Piece' story, in these fanfics, it might be explored as a more romantic or intimate relationship. Another theme could be sacrifice, as both characters are known for their selfless natures in the anime.
I'm not an expert in this particular type of fanfic. However, you could also join some 'One Piece' fan communities on social media platforms or forums. Fans there often share and discuss their favorite fanfics, including those with Ace and Luffy in a certain relationship. They might be able to point you to some great reads.
There's a fanfic called 'Sabo, Luffy and Ace: Unbreakable'. In this fanfic, it explores their past, present and future. It shows how their shared experiences have shaped them. It also has some interesting plot twists that keep you hooked from start to finish.
One common theme is brotherly love. Since they are brothers in the One Piece universe, fanfics often explore the depth of their love and loyalty for each other. Another theme is growth. They both grow as characters, and fanfics may show how their relationship helps in that growth. For example, Luffy might become stronger because of Ace's influence.
One great 'ace x luffy vampire fanfic' is 'Vampire's Bond'. It beautifully weaves the vampire lore into the relationship between Ace and Luffy. The author creates a unique world where Luffy's innocence and Ace's protectiveness are enhanced by the vampire elements.
Rediscovery of their relationship after separation can be a theme as well. Given their backstories in One Piece where they were separated at times, in the fanfictions, their reunion can be the starting point of a new, more romantic relationship.