Truly an incredible loss to the whole gaming community. His contribution to this hobby from creation is immeasurable.
I also have met him, but I think I may have the extreme honor of claiming the "My character died at the hands of Gary Gygax" title. He ran a couple of short dungeon crawls at Imagine-Con in Norfolk a long while back and I signed up and luckily got selected to play. He's an amazing Dungeon Master and it was truly an honor to have been inspired yet killed with a roll of his die.