Haha that was entertaining but most of mine have already been posted.

Mine is when you go crazy seeing a Solari board and you almost miss your flight being mesmerized by it.

Travelling to 8 cities in 5 countries in 12 days, beeing greeted "welcome back Mr onobond, nice to see you again" by hotel bell staff and receptionists. Returning home the receptionist at your office asks if you have an appointment

You have your frequent flier numbers (yes, plural) memorized
Your friends greet you with "where is your next trip?"
You attend a social event in your hometown and people act surprised to see you
You know the configuration for every aircraft type (and subtype) of each airline
You have your Amazon packages shipped to your hotel
While watching sports, you cheer for the team located in your favorite city to travel to