Ok . . . so he's either a Boardgamer or a REALLY BIG DOOM FREAK . . . which kind of makes him a bit creepy.
Since you only saw DOOM (as I infer from your statement) I'm going with Doom Freak and not boardgamer.
He is a HUGE Doom freak. He interview The Rock about the Doom movie and Jon went all big huge fanboy while interviewing The Rock.