I wonder if these folk experience reverse culture shock after coming home? I imagine that after being up there so long, Earth starts to feel a little foreign. Little things, maybe--like finding a nest of bees in your back yard, and being surprised that you can't just float up and reach it. Or waking up to the rush of cars and the rustling of leaves, instead of the constant hum of machinery.
There's got to be a story in here somewhere--and I'd be very surprised if someone hasn't already written it.