I don't think there is anything wrong with having pride in what we do for a living, and if people ask me what I do outside of work I will tell them honest answers (that I work for a crappy regional X that feeds major airline Y). That being said, on a layover for work is a completely different scenario. It changes the game completely especially when you have a beer in your hand. I find it best to avoid the subject at all costs. Not to mention you come off as a giant D bag to the rest of your crew when you brag about your 14 hr 5 leg duty day and you can still throw down like a rock star at the bar.

Again, outside of work then blab all you want. At work, just keep your mouth shut and seriously folks - if someone asks and you are too slow to think of an alter ego just say transportation or something.