Mako's Scarf/Amon's Mask strikes me as the new Zutara, that one ship that everybody loves that I'm just Meh on.

Lin/Iroh the younger has become That One Ship for me, the one that has no canon support, but I ship it like burning anyway, and I can't find any fic for it, because they don't interact in canon, and it doesn't occur to anybody else to ship it. *insane fan flail* Oh well.