In 1997 I went to Asia with a friend. We were obsessed with travelling light and bought tiny rucksacks, easy to haul on and off of buses and trains and use as pillows to help prevent them being stolen.
Great plan, you might think. Apart from the proportions of our packs not matching at all the volume of things we might require or want for a supposed year-long trip. Of course, only once we were well into our overland crawl from Nepal to Goa, did we realise quite how ridiculously ambitious our light-living ideals had been. Thus, we always had more stuff to carry than our bags could hold.