1. Opening your overhead bin and finding that someone has taken up all the space with something that shouldn't be in there.
2. Doing the walk of shame past first class and seeing them all spread out and comfy.
3. Smelling the stink of some potent food a fellow passenger has brought on board.
4. The fact that you are basically in a tube of circulating airborne illnesses.
5. Having the shame to hold in your farts, but being surrounded by those who don't.
6. Opening the in-flight magazine and seeing that the crossword was already done.
7. Accidentally engaging with the talker next to you, and then listening to their whole life story.
8. Getting the one broken air vent because why wouldn't you?
9. When the movie that is being shown is one you've watched already.
10. Or worse, not getting ANY movie.
11. Two words: Crying. Children.
12. When you're trying to sleep on an overnight flight and two people. Keep. Talking. Loudly.
Can't you tell that everyone around is trying to catch some z's? That's right, you're too busy talking about your new chinchilla. My bad.