I'd love to see a Harvester or Sanitarium one, either one of these games would be perfect for a Halloween special, I think there would be a lot to talk about. They're creepy, weird, grotesque even, obscure-ish and broken at times, which is why I think they would be great candidates for a GD.
I'd also like to see a Deadly Premonition one, with the second episode coming out this year, and I know Ross loves bugged games that are hard to get to work properly ?