Another theme is sacrifice. Since they are in a dangerous world of 'Game of Thrones', they might have to sacrifice personal desires for the greater good. Fanfictions often show how they make tough choices regarding their family and the North.
One great Ned and Catelyn fanfiction is 'A Winter's Love'. It delves deep into their relationship before the events of the series. It shows their courtship and how they came to love each other, with beautiful descriptions of the North.
Well, it could have led to a completely different power dynamic in Westeros. Maybe Ned would have made different alliances or faced more challenges alone.
Ned Broyles in 'you tube ned broyles war stories' is likely someone with personal experiences in war. He might be a former soldier, sailor or airman. Maybe he has decided to share his unique insights and tales from the battlefield or military operations on YouTube for others to learn from or be entertained by.
In many mainstream comic universes, Ned may or may not appear. It really varies based on the storyline and the creative decisions of the writers and artists.
One of the best Catelyn Stark stories is her role in the Red Wedding. She was so strong and full of love for her family. She tried her best to protect them, but the betrayal at the Red Wedding was heart - wrenching. Her reactions and the way she faced that horror showed her true character.