If a ship is pitching the middle of the ship is definitely the best place to be. The bow (forward) or the aft (stern) would be the worse for movement.
A good way to visualize this is to balance a pencil on your finger. Think of the tip as the bow and the eraser as the stern. The pivot point (your finger) would represent the middle of the ship as far as movement.
It shouldn't be a problem though under normal sea conditions. It can get bouncy under adverse sea conditions though.