Is aft better than forward?
The forward is subject to the most movement out of anywhere on a ship. And the higher the deck, the more pronounced that rolling and swaying motion tends to feel. Movement at the aft is a bit less drastic than the forward, but still isn’t the most stable place for those who are prone to seasickness. If you are keen on a view out over the ship’s wake and the potential for scoring a larger veranda (and don’t mind the potential for some extra vibration), then the aft of a ship is probably the right move. Keep in mind, too, that there is a case to be made for forgoing both sides and simply booking a midship stateroom.