You know what makes me feral? Robb Stark making Jon Snow his heir. From every single possible angle, it's just too good.
Robb's unfailing trust in his brother. His willingness to fight his mother for Jon, even after the Theon fiasco, and insist that Jon is different. Robb's love for his bastard brother is one of my favorite things about him, and the moment where he decides to make Jon his heir is truly Robb at his best.
And Jon never finds out. He turns down Stannis's offer of legitimization and Winterfell, not knowing that everything he ever wanted is already his. It drives me crazy, because it would mean so much to Jon. Even if he wouldn't abandon the Wall for it, he would want to know that Robb loved him enough to make him a Stark.
And Sansa! The way her ghost lingers over both boys. The way Robb and Jon think about their sisters is one of the major differences between them. Robb wouldn't give up his honorable war or his prisoner the Kingslayer to save two little girls. He disinherited Sansa when she was married to Tyrion, which is good military strategy to keep Winterfell out of Lannister hands, but would hurt her immensely if she knew.
And Jon is the opposite. Jon dies trying to get to Arya, because he will give up his honor and prioritize one little girl over a war against a literal army of the dead intent on annihilating all the living. (Not good military strategy, but Jon and Arya's bond is so important). And Jon won't take Winterfell when there's a chance Sansa will claim it. Even when Stannis calls her Lady Lannister, Jon does not dream of usurping Sansa's claim. I truly believe that Jon would sooner have Lady Sansa Lannister rule from Winterfell than claim it while she lives to keep it in "Stark" hands.
The politics of which Stark sibling holds the North is endlessly fascinating to me and I wish they could know what their siblings are doing for them. Jon should know that Robb made him a king. Sansa should know that Jon refused to take her home.