I'd like to see his reactions to certain parts of the series
I was gonna say the same thing. I'm currently doing a rewatch right now, and debated bringing the idea to the board of doing a VERY heavily scaled down version of the espisode threads we used to have on here when it was live (man those were fun). Not for every episode, obviously, but maybe a thread for each season.
Seems like with someone watching the show for the first time, it'd be cool to have that interaction and discussion with others that we all enjoyed having in real time. Although I'm not sure how well it would work since everyone else has seen it and knows the answers while he's the only one that doesn't. I do think it'd be cool to get his take on certain scenes, episodes, whatever as he watches.