I am not an extrovert of any sorts but also not an introvert in the classical sense either. Which means I do receive energy by social interaction from people but also invest own energy. When there are too much such interactions that balance tilts to the negative side. I do from intense and multiple customer interaction loose energy. So sometimes I'm like the Energizer bunny without battery and sometimes still going but at half the rate. Afterwards I need to refill, recover, recharge. A bit of Kate alone at home is then required.