I used to work (not at the same company but I had to collaborate with him a lot) with a man who NEVER say "hello" "good bye" "thank you" "please" no basic people skills and really gruff to boot. I finally got used to it. But one day without thinking I asked a volunteer to call him to get some really basic information, she was practially crying when she was done. Never again did I ask anyone else to call him.