Normal
I was aft on the Grand Princess - A736 (an inside but still pretty far aft) - felt minimal movement in this cabin. I truly think it is how you perceive motion. I have rarely been midships (only once in 8 cruises) and otherwise have been aft 5 times and forward 2 times...neither time did I feel any undue motion (and two of these cruises were in the open waters of the Atlantic and the Pacific oceans.