> We spend so much time dealing with tools that tend to be extremely pedantic and detail-focused.
This in combination with deadlines has caused my resting face to develop into an angry expression. As soon as I stop smiling and return to my “neutral” face, I look like I am angry, ready to kill someone. I now make an effort to smile while walking so people don’t get frightened.
You've just described my face since I joined my current company (about a year now). My old job was half the stress and I worked with people that were fun and respectful of each other. Now I work in a place with an unscalable pace of work with people that are angry and hate each other. My resting face is one of anger and despair even when I'm not working.
This in combination with deadlines has caused my resting face to develop into an angry expression. As soon as I stop smiling and return to my “neutral” face, I look like I am angry, ready to kill someone. I now make an effort to smile while walking so people don’t get frightened.