A recent Christian Science Monitor article talked about "The Artful Dodge of Housework." What I found so interesting is that idealistic straight couples would go into their marriage thinking that they'd split everything right down the middle, while in practice, it was frequently the mother who would do most of the housework once the couple had children. The women (all straight) in the story considered their husbands "amazing" if he did about half the work.
In practice, I'm a terrible housekeeper, but I do all the laundry, about half the dishes, and almost none of the cooking. I do a lot of the paperwork, but about half of the billpaying.
What are your labor divisions and how have you worked it out? Each according to his/her strength? Alternating each week?