I offer no humor. I smile. I listen closely. I answer only when the question has been completly asked. I think about my answer. I am clear and consise. I only answer the question, no extra fluff unless they initiate. I try to say thank you in their common language. Some can have a real stick up their ass.....some can be super nice. I'm sure it is a tough job. Every once in a while I will be finishing up a long, tough, business trip and while coming back into the US the agent will finish the interview with "Welcome home" Man......that can get to me. I almost choke up.