...if a passenger asks the crew if this is the first airplane they've flown...then you might be on a regional jet...

...when doing the walk around at O'Dark Thirty and almost have a heart attack when you get near the baggage door and it slides open and two rampers jump out...you might be on a regional jet...

...when you have to explain about 899 times a day that the bags with a red tag will be on the jet bridge when we land...you may then be on a regional jet...

...you may be on a regional jet when each and every captain makes it a point to tell you that he was flying before you were born...had to have 5000 TT to even get an interview...never had an auto pilot...and how easy you have it being a 250 hr FO...(even though you have quite a bit more than 250 hrs)....then you might be on a regional jet...