What people have to realize is, Nakahara Aya's ideal of love is not really about romance. It's not about sweet compliments and dream dates. It's more of a peasant thing--a couple of people happily bickering with each other until they're 90. Her couples are usually like that.
Even after almost 25 years of marriage, I myself am somewhat more about the cheesy romantic lines and nice dates, but I can appreciate her style too. And it makes for fun dialogue.
That said, even I have to admit that the bickering lately could stand to be a bit happier.