I agree, diplomacy is a critical skill. Grumpiness is basically anger, and all anger comes from pain. Programming is fun, but getting yelled because we missed

I agree, diplomacy is a critical skill. Grumpiness is basically anger, and all anger comes from pain. Programming is fun, but getting yelled because we missed a deadline or got some feature slightly wrong is painful. When Suzy asks for a change to the link, she's not trying to cause pain, but it's easy for all that previous pain to come channeling through and end up all over her. Road rage works the same way.