Don't be a complainer; make things better, let it go, or take action to make it better.
Enthusiasm is my superpower. One might say that confidence yields the same result. I disagree. Confidence is about yourself, enthusiasm is about something else. Confidence is impressive, but enthusiasm is infectious. Confidence is serious, enthusiasm is fun.
I started a list of things I want to teach my children, and that list is eight points long. The first one is, do what you love.