I wonder what is the most boring?
Countless years ago, as a trainee in BOAC, I was assigned for a short while to a flight ops documentation department. Since they didn’t have much for me to do they used to send me to their little in-house cinema to watch crew training films of airport approaches. Most were boring as hell, the only really interesting one I saw was HKG Kai Tak (as you might imagine).
The one I remember as being utterly, totally boring was Talara in Peru, which the crew had to be familiar with because it was an alternate for Lima. Very long approach over utterly featureless landscape, not a hill, tree, road or house anywhere in sight.