Do the astronauts miss space?

Last night, while watching the NASA channel, I wondered when the astronauts come home from space, do they miss it? Also, when you're in space are you rocked about like you are on a cruise ship? Do you feel the speed at which you are flying over the earth?

I know my girls miss the rocking of the Disney Dream. It only took a 4 day cruise and all they have been talking about is when can we go back... every waking moment. It is as if they were born for that boat -- a boat that gives you everything you want with a swipe of your Key to the World card.