Compared to all the people posting here, I barely knew JD. I met him twice at MAAWG, exchanged a handful of emails with him and read lots of his posts at various anti-spam/IETF lists. He always seemed to me to be a genuinely nice person. Also someone who really want to make the Internet a better place – not someone who thought that x years of working within the industry/community entitled him to say how things should be done, but someone who listened to other people’s arguments and always had balanced arguments of his own.
Having read the things many people have written about him, here and elsewhere, I am now certain he didn’t just seem nice: he was nice. And I feel sad I never got a chance to properly meet him. Still, may he continue to be an inspiration for many people sharing his goals.