No, not every relationship is about tension and conflict... but reading the books, I don't get any zing between them, you know? So thinking about them in terms of fanon, I ask myself, 'what would make this pairing interesting enough that I don't want the characters pairing with anyone else?' and for me, I don't really have a good answer.

Although I agree about it being very, very interesting to see Hermione interacting with someone who is her intellectual equal.