If you’re travelling on a longer cruise then you’ll want the most space possible, not only to help store your extra luggage but to make sure you have a more enjoyable room, since you’ll be spending more time there. If you can afford it then a suite is a wonderful option, as you’ll not just benefit from the extra floorspace but you’ll also enjoy a butler service.
However if you can’t stretch to a suite, definitely look to a veranda room, giving you a relaxing outdoor space where you can enjoy the diverse scenery in each port.