My gratitude and appreciation is contagious

You've been in a room with someone whose mood set the temperature. Usually not the loudest person — just the one who was clearly, unfussily glad to be there.

That transmission is real and mostly non-verbal. People catch tone long before they catch content, which means announcing your gratitude does far less work than displaying it.

The reverse spreads faster, though. One person cataloguing complaints will reorganize a whole table inside ten minutes. Worth knowing about yourself.

In the next conversation you have, notice which one you're handing over.