As you keep expanding the questions, I keep editing!
1) Nightmare would be learning that I am swapping with Margaret Abbott or Ann Romney -- and that I am left with an uber-conservative (temporary) spouse who holds a lot of views that offend me to my core. I really don't think I could rise to the challenge.
2) I think it would be enlightening for me to do a swap with a rurally-based family, particularly with a family who "works the land." I have only lived in major cities/suburbs of major cities, and all of my jobs as an adult have been desk-based/professional services. (ETA: Cezanne's answer is very intriguing)
3) My ground rules would be (1) "All family members should be treated with respect." I wouldn't be able to deal with a temporary partner who disrespected me or the kids, nor could I handle kids who have zero respect for adults and (2) "Let's have some fun." Regardless of family situation, I'd want to smile and laugh at least a portion of each day.
4) I don't consider these to be "flaws" with my family, but these are things that might make a swap with our family difficult for some women: (1) I could imagine that some would find it tough to (temporarily) parent a child with special needs (2) any woman who needs a lot of positive reinforcement/verbal praise from a partner in order to feel validated/appreciated would be up Sh
it Creek without a paddle because my husband just doesn't dish it out (though he is a lovely guy).
5) So many pluses!

We are a very laid back, down-to-earth family, and our house is a place where people like to gather. All of us have very good senses of humor, and we are genuinely good, honest people who care about others. My husband and I have a very equal partnership, and he would treat any temporary spouse with respect. Oh yeah, and we have every cable channel under the sun, great food & a well stocked wine closet.
This post has been edited by baddmammajamma: 29/12/2012, 11:00 PM