Havick:
The problem is it's the bad experiences that most passengers remember, not the good ones.
There are rarely "good" flying experiences these days, we instead judge what is "least bad".
That is a function of travel to airport + airport experience + flight + airport experience + travel to destination.
Virtually none of it is "fun" anymore unless you are a first time traveller, and the gouging, security theatre and sheer inconvenience of the major airports almost guarantees a rotten time without even considering such things as delays, bogans and lost bags.
My preferred mode of travel now focuses on not more than Twelve hours flying, then a sleepover, then onwards to somewhere in Europe that I can catch a train. I will not fly into any British airport at any price - and America you can completely forget about.
...Unless someone else is paying for valet parking, the lounge and a business class seat.