I try to be a nice person most of the time. Sometimes I try to be a snarky person if I feel like someone is purposefully messing up my day. But most times, I try to smile and respond politely. I say hello and thank you to the bus drivers and the building manager in the morning. I include “please” in my requests for food, drinks, or cookies, especially if I want something changed or added. Most of the time, I even brush off mistakes when the wrong food arrives at the table (although, depending on how the server handles it, I may mutter annoyances once he leaves).
But sometimes you encounter baffling customer service that makes you want to storm out, or leave a penny tip, or just never go back.