In the 1980s I became a regular (or should that be frequent?) traveller in B747s.
Scandinavia, Australia, New Zealand, Hong Kong, Singapore, Taiwan - SIA, BA, and, probably, CAL and SAS.
Worst experience was when the Hong Kong computer system broke down and we all had to have our seat allocations boarding passes issued manually -it took hours.
Best was an underoccupied SIA flight where I was able to lie across the centre row of seat and get a proper sleep.
SIA service was far and away above the rest - the cabin crew made me feel honoured and respected.
On one BA flight the hostie refused to move her cart into a space so that I could use the gangway - I was only business class, but I got the impression that she considered herself more important than the passengers.