But surely no civilized person would even think of arranging a cutlery drawer in a different way from how cutlery drawers are supposed to be arranged?
-- Narrator (Chapter 1)

Importance: Britt-Marie is so rigid that she believes everyone should arrange their cutlery drawers in one particular way. She believes those who do not arrange their drawers the same way she does are barbarians.

I don’t use perfume, so I asked him to always put his shirt directly in the washing machine when he came home. He never did. Then he used to yell at me because the washing machine was so loud at night.
-- Britt-Marie (Chapter 3)

Importance: Britt-Marie tells the girl at the unemployment office that she realized her husband was having an affair because she could smell the woman’s perfume on her husband’s shirts. It was why she insisted on washing his shirts each night.

Because you can’t change Britt-Marie’s way...
-- Narrator (Chapter 5)