Caught In A Transformative Romance

So I was grumbling to people, as I do, about books. And at one point I was saying 'Oh, how can someone want Character A and Character B to get together?' And I was answered: 'Well, they're attractive, and get on well...' To which I: 'But surely that's not enough?'

Obviously it is enough in real life, at least initially. But just as I demand little more from life than a comfy chair and a delicious drink and an excellent book, I would not be thrilled by a book about someone in a comfy chair with...