was on the same plane yesterday JFK-LAX-JFK; different crew, though. Gate agents are actually the ones that remember me the most--I recall a mileage run a few years back (in May, like $350 ai JFK-SFO-DEN-ANC-DEN-SFO-JFK) where the gate agent took one look at my itinerary and started to laugh, saying it was way too early to be worried about my miles.
I'm sure this is pretty common. I just get a kick out of it when you have a ticket booked that is an odd routing like MSP-BMI-ATL-CMH and the GA looks and is like what the heck? It's not my fault Delta Pricing experts decided to price that itinerary $800 cheaper than MSP-CMH or MSP-DTW-CMH. I remember going through BMI a few months ago thinking I must be one of the first transit passengers at that airport. The way back I had an equally bizarre routing but thankfully the GA let me SDC to the direct CMH-MSP flight...I lost a couple thousand miles but got home 5 hours earlier and was able to spend a few extra hours with the wife.