Qantas flight from Frankfurt to Bangkok around 1998, economy class, being awoken somewhere over NE India and asked "Would you like champagne with your breakfast sir", remember seeing the Himalayas on the horizon at daybreak. Champagne doesn't seem to appear now in QF economy.
Daftest thing I have ever done was to take packed sandwiches on my first ever flight, 747 Man - Lax with good old Caledonian back in 1989. (yes, I ate em, with my G&T !!)
Was upgraded with Emirates Man - Dubai back in 1996, only 20 passengers !!. Onward flight to Hong Kong similarly empty, but not upgraded, still we all had a centre row of 4 seats each.
My son was taken into the cockpit of a 747-400 LHR-SFO in 2000, half an hour in there flying over the Canadian praries. He still talks about it. Pity this is no longer possible.
Never had any bad experiences, nearly all my flights have passed with reasonable comfort and efficiency.
Airlines are fine by me - Airports are another matter !!