Most people we know have the horrors when you mention packing for a trip. Cases and cases of clothes are humped from car, to bus, to tube, to train, to aircraft, up stairs, down stairs and, finally, into My Lady's chamber.We have a practiced procedure. If the stuff doesn't fit in a medium size case with a total weight less than 22 kilos - forget it!
We know a person (notice the carefully PC'd use of person) who insists on taking at least 10 pairs of shoes and sufficient cloths to match; "You never know if you will be invited to a wedding, bar mitzvah, funeral or some other social even". Two, or more, gigantic pieces of luggage result. These are, of course, never toted by said person and, amusingly enough, the complaints about the cost of excess baggage is one, if not the prime, feature which dominates their post-trip ramblings.
At one airport someone got to the check-in and, finding that their luggage was way over allowance, they opened their luggage and proceeded to don as much clothing as they could. The Michelin Effect was very funny, especially so when the luggage was still over weight.
Well ... we're all different ...