Well, it was 22 years ago, and I thought they were all wonderful, although I know now why it is best not to leave Vegas on a Sunday night (I hate to think what McCarran is like after a long weekend, or even worse, Easter). SFO was pretty hectic, and I thought the plane was going to land on the San Mateo Bridge(!), but LAX, which had a reputation like Cirith Ungol, was amazingly efficient, I thought.
Sea-Tac was a blur - by my own fault, I arrived late, and hardly had time to say good-bye to my hosts from Poulsbo, who drove me there - we missed the Winslow-Seattle ferry. But GETTING there, via Sydney and LAX, was awesome - it's hard for me to describe, but to FINALLY, actually... BE in Seattle was just dreamily surreal.
Sydney Airport, however, sucked rocks, cubed. I emphasise this was 1996, and SURELY it was vastly improved for the Olympics in 2000. Adelaide Airport sucks, too, although it is simply a wannabe backwater (which isn't so bad to live in). There's a pointless "no man's land" between the piddly carpark/hyper-congested taxi stands and the terminal, which is seemingly bigger than some European countries, and you need a scanning electron microscope (and the bank balance of Elon Musk) to manage a drink in the bar.
Other non-USA airports, if I may... Heathrow is very efficient. Frankfurt, Germany was a bugger, but only because I missed ONE gate sign. However, the plane to Prague was about 3 kilometres from the terminal, on a windswept field.
Finally, despite being very, very sick (the chest infection which inspired me to quit smoking), Changi in Singapore is awesome!