"What other roleplaying author besides Gygax impressed you with their writing?"
I'd definitely have to go with Sandy Petersen, principal author on the Call of Cthulhu ruleset. While impressed with the breadth of material he could pull from the mythos while still adding in enough crunch to make a game, what's really impressed me is that despite being a Mormon, he publishes these amazing games in a medium that has been demonized by the media as leading to satanism and suicide. I think this quote pretty much sums up a) why he sounds like a pretty cool guy and b) what people who have a problem with these types of games should be thinking about. He's talking about Doom in this quote, but it can translate to Call of Cthulhu pretty easily as well.
"I have no problems with the demons in the game. They're just cartoons. And, anyway, they're the bad guys."