Here are some
Ok I have many annoyances as a frequent flier. I hate it when a traveler is at the check-in kiosk and is not even ready to give the bag to the agent.
I also dislike it when people take their time to get their things ready for security. The moment after I check in i put my cellphone and wallet into my backpack and get ready to go through security. About one or two people before me who are going through I have my shoes removed and the bin with my things ready to go.
I also am annoyed when the flight information boards are not working properly.
I also hate it when one passenger is taking up two seats in the gate lounge yaking on their phone when I could use this seat. Also I don't like all the passnegers lining up to board the plane as they know they board by group or row numbers.
I also don't like it that Starbucks charges an arm and a leg for coffee and they can't offer me the 50 cent refill. I wish they had Pikes Blend and operated like a true Starbucks. They want to charge me for another coffee.