I Don't Care How Good You Are At Programming
I don’t care how good you are at programming, finding bugs, whatever. If you’re rude, or if you speak poorly to people who don’t understand your... quirks... you will wind up being shunted to the side. No one wants to work with someone who makes them feel beat down all the time, or someone who they simply can’t understand, or someone whose reaction to every issue is to start wailing about the end of the world.
This is such a great concept to keep at the front of one's mind. Everyone, from your customers to your co-workers, family and friends, deserve your niceness. Their concerns and questions are real. Your attitude can go a long way toward keeping the peace! Her follow-up post defining What Really Is Nice? also hits home for me.