For many people, many, many people, Doom flexed silicon in a way they had never seen - it was the sort of game you invited people over to look at. What if you could have that again? Genuine surprise, the sort of atmospheric experience that makes gamers out of people. What if you could transform all the tired first-person cliches back into substantial gameplay mechanics? That's Doom 3 in a nutshell. I'm essentially a professional cynic and I can't stop playing it.
He's still unapologetic about making fun of the screenshots though.