I go to church with my wife and last Sunday the sermon was about having grace for people that don't thank you for things you do. It was a good thought. We don't thank others as we should such as custodians and facilities people because we expect a clean office and conditioned air etc. He said when we do things at a high level for a long period of time people stop thanking those people. I thought it was a good thing to remember and it adds to our happiness as well.