Well, some 'asoiaf oc fanfiction' that often gain popularity are the ones that give a new perspective on existing events. Take for instance, an OC who is a bastard child of a minor noble in the North. This character's journey through the harsh northern winters and their attempts to find their place in a world that shuns bastards can be really engaging. Also, fanfictions with an OC who is a hedge knight, traveling from place to place and getting embroiled in local disputes are quite liked.
One popular 'asoiaf oc fanfiction' story could be those that focus on a new character inserted into the complex political web of Westeros. For example, a story about an OC (Original Character) who is a foreign diplomat trying to navigate the power struggles between the great houses. Another might be an OC who is a maester - in - training, uncovering long - lost secrets in the Citadel. There are also stories where the OC is a sellsword, getting involved in various battles and intrigues across the Seven Kingdoms.
One interesting OC ASoIaF fanfiction could be about a commoner who rises to become a trusted advisor in a noble house. They might use their wits and knowledge of the common folk to navigate the complex politics of Westeros.
One popular 'asoiaf fanfiction' story is 'The Prince That Was Promised'. It offers an interesting take on the prophecies in the series. Another is 'Arya's Adventures Beyond the Wall' which expands on Arya's character and her potential travels in the wild. There's also 'Dany's New Reign' which speculates on what Daenerys' rule could be like if she had achieved all her goals in a different way.
There are 'asoiaf si fanfiction' stories that revolve around time - travel concepts within the world of A Song of Ice and Fire. These often have a character from our world being inserted into the story's universe and trying to navigate the complex politics and magic. Also, some fanfictions deal with the aftermath of the events in the books in a creative way, like how the kingdoms are rebuilt after the war.
Power struggle is a common theme. Just like in the original 'A Song of Ice and Fire', OC houses often find themselves in the middle of a fight for power, whether it's over a region or influence at court.
One challenge is staying true to the complex world - building of ASOIAF. The lore is so detailed that any deviation might seem out of place. Also, making the OC believable and not too overpowered can be tough.
One popular asoiaf fanfic is 'The Winds of Winter: A Different Path'. It explores an alternate storyline where some of the major characters make different choices. Another one could be 'A Song of Ice and Fire: The Lost Tales' which delves into the backstories of some minor characters in great detail. And there's also 'Asoiaf Fanfic: The Dragon's Heir' that focuses on the descendants of the Targaryens in a new and exciting way.
One interesting feature could be unique family traditions. For example, they might have a special way of greeting guests that is different from other houses. It could involve a particular type of ceremony or gesture.
There's also 'The New House in Westeros'. This fanfiction creates an entirely new house and follows their journey in the complex world of Westeros. It's interesting because it shows how a new house can interact with the existing great houses and navigate the political intrigue. It has detailed descriptions of the new house's sigil, motto, and family members.
I'm not sure it can be considered a 'popular' genre. Fanfiction in the 'asoiaf' universe is vast, covering a whole range of topics. Some might be interested in the sexual aspects in fanfic for this series, but it's likely overshadowed by the huge amount of non - sexual fanfic that delves into the complex plotlines, relationships, and the unique world George R. R. Martin has created. So, in short, probably not that popular compared to other types of 'asoiaf' fanfic.
Jon Snow is often a popular character. His noble nature combined with the potential for new abilities or knowledge from the gamer aspect can make for great stories. He might be able to use gamer - like strategies to fight the White Walkers more effectively.