Best long-haul flight of my life was an Economy Qantas flight 8 years ago, from Sydney to LA in the little 'secret' Economy section on the top deck of an A380. Stalked those seats online and changed ours when they came free a week or so before we left.

It was like Business-lite for an Economy fare. A little section of really only a few rows. Quick boarding, heaps of room, friendly, attentive staff, two-abreast seating so it was just my wife and I with no random third wheel. Made the trip SO much more comfortable.

The return trip downstairs was like being wedged into a cattle truck in comparison.