Does depend on demeanor, when I worked for a fast food place I loved the drive thru headset, would often get asked why I'm so happy.
My stock response was "well if I'm happy it gives you one less thing to complain about." Would get a small chortle out of some.
I do find some staff are better than others on the railway. I know the avanti staff who run the everos calling at Lichfield in a evening are a great bunch, even if I do kill their dwell time because the ramp process on them trains are a bit complicated.