Suitcases that become trollies.
Trollies that run over the feet of others.
Wheelies that fit overhead lockers.
Hand baggage that is too big for a hand.
Waiting in long queues.
Cases filled to the brim to avoid paying for baggage in the hold.
Seats that cannot be reclined
Baggage for flights that often run late
To airports far from where you actually want to go.
Suitcases to avoid waiting at the baggage claim.
The joys of ‘budget’ airlines.