Yes! That moment when a certain customer comes in and suddenly all of your colleagues are elsewhere. I took the same approach when I worked part-time in the library near my parents' house. Treat the grumpy and demanding ones with kindness and respect and it's just soo satisfying when they leave with a smile and you have the great feeling that you made their day a tiny bit better. It can be hard work, but so is pretty much anything that's worth doing.
Loving these nuggets of wisdom from behind the steering wheel. :)