We sailed on the Dream deck 9 aft cabin 9166 which is the second cabin from the rear of the ship (still on the side) and we absolutley loved it!
It was our first cruise and our
travel agent had placed a hold on it so we did not know anything about preferences. This location ended up being a dream location for us. We were at the end of the ship, no foot traffic except to the few rooms past ours, few steps from the elevator and stairs that were hardly ever crowded.
Plus only two quick flights of stairs up to deck 11 and you are right in Cabanas and next to the pool deck. Drink stations and Coffee. I often would go up to deck 11 to the drink stations and get my coffee and come back to room as everyone was getting ready for the day.
Forget about movement worries, I walked all over th ship and could not tell the difference with movement. the most movement I felt was our last night in the main theatre which was forward on deck 3 or 4 I think. Plus, you are not really in the room much anyway. Alot of the time the ship is docked anyway. We were on a 4 night crusie and I was surprised at how little the ship sails, what I mean is, after the first night the Dream pretty much just holds position in the water, barely moving. But when you look at how close the islands are it makes sense.
But the convience of having deck 11 just two flights above and then the elevator ride down to the District and reastaurants is priceless. Enjoy this location, you will love it!