India, Oct. 22 -- After travelling with more suitcases than I care to count, I have become slightly obsessed with how people pack. I notice the huge suitcase being dragged through the airport for a three-night trip, the tiny cabin bag that somehow weighs more than the person carrying it and the traveller trying to close an expandable case while sitting on it. I have done versions of all three myself. The funny thing about luggage is that we tend to shop for it by looking at the specifications first. How many litres does it hold? How many wheels does it have? Is it hard shell or soft shell? How many compartments are inside? Those details matter, but they do not always tell you how the bag will behave once you actually start travelling with...