He seemed quite a nice guy if his interviews are anything to go by, he was probably better at the technical side as supposed to Bill who was more sales driven. He re-wrote DOS for version 2 at a time when he was very sick, I hope he patched things up with Bill as the 2 of them haven't spoke much over the years. I loved the story of him writing the boot loader for the Altair during a flight to demo it at MITS. RIP Paul, a true digital pioneer ..