SOULBONDING! I think Mark and Eduardo from The Social Network make for great soulbonding fic. That's why I'm sad that apparently there's so little of it, I only remember reading two (although there are several that go in this direction without labeling it as such). But they are so perfect for it! Eduardo who has all the feelings and Mark who strives to have no such things. And then there's of course the part where they hate each other and live halfway around the world from each other, that complicates things. All in all it's so perfect, I could read a hundred stories about it. Even though this one got it pretty much right on first try.