He was a great man in every sense of the word. Despite his enormous accomplishments and being a historical figure, he still took time to address his emails personally and answered every reasonable request. I was his assistant of sorts during a period in Cambridge, MA, and one time he got this request from a person asking him to write to his HS math teacher because this teacher had inspired him to go into math. Well Prof Mandelbrot wrote him a beautiful letter that still chokes me up when I remember it. After he dictated it to me, I told him that at that moment and from then on, that I would be glad to take a bullet for him. He chuckled, thanked me in a very modest tone and proceeded to the next topic. He was always polite and pleasant and full of energy. May he rest in peace.