For most of my trips to Asia I have taken backpacks rather than cases as they are more practical. This is mainly for beach and island trips because many areas don't have pavements, so trying to wheel a case isn't practical. Also on one trip it was by boat, and a suitcase was not a good idea, and even with my backpack, I learned to put everything in waterproof bags too. Why, if you get a bus, they put the luggage on the rack ontop, and that means if it rains, things will be very wet. Do you consider this on a trip? If not, it's worth thinking about, or taking a soft sided holdall that is easier to carry.