On the contrary, I went to check-in about 5 hours prior to my CX flight to Vancouver at the end of Jan. There was one woman manning the CX counter. I was all ready for 'attitude' after reading horror posts here. But you know what? I had a hoot with her. We talked about the weather NYorkers had been having lately, etc etc.
So basically if you let your guard down and perhaps liven up a little, bad moods will turn to good moods!