I was shocked when he spoke at my commencement, I was already a fan but felt like I was the only one there that knew who he was. He was extremely unpretentious

I was shocked when he spoke at my commencement, I was already a fan but felt like I was the only one there that knew who he was. He was extremely unpretentious and just wanted to joke the whole time. I remember reading how his family only gradually became aware of his celebrity in the technical world.