Of course, it depends on the seas when you are sailing. When you do get larger swells and rough seas, the most motion is felt forward. The least motion is felt in the center of the ship. It is also said that the higher up you go, the more motion you will feel. So in theory, forward and top deck will be the most motion felt and lowest deck center, least. IN THEORY. If the ocean is a rollin, you'll feel it. Ive been on cruises that have rocked so hard it was tough to stay in bed. Others, You won't feel an inch of movement. Another thing to remember (in choosing cabins) is that aft, manytimes you will feel the engines (Propellers?) turning and grinding when docking and such. I like the rumble you feel, but some others don't. If you are an early riser, you should have no problem with this (as you generally dock around 8 or 9 am).
Mrsfuzzmo