Most of us are interested in planes – at least, a little bit. We want to know that they're definitely going to take off and land. We'd like the seats to be comfortable. We hope there aren't long queues for the toilets.
But that's generally where it ends. Planes get you from A to B. There's no more to it.
For some travellers, however, there's a lot more to it. Some travellers, to put it bluntly, are kind of obsessed. They love planes. They know planes. They get just as excited about the thing they're flying in as the place it's supposed to take them.