All discussion relevant to Countdown that is not too spoilerific. New members: come here first to introduce yourself. We don't bite, or at least rarely.
While Alistair was great and I surprisingly enjoyed Mark Durden-Smith I've gone for Jon Culshaw. For me he seemed really excited about being there and playing along. I hope all three get to return.
Has to be Jon Culshaw, basically for the reasons Mark's mentioned. He was like that both on and off screen. When we were having the group photo done, someone called him "Rory", whereupon he started impersonating Rory Bremner. And at one point when I was heading back to the studio from the dressing room, I passed him going the other way, and he put on his famous Tom Baker voice and said "good show, Brigadier" by way of congratulations.
Look forward to seeing him on the show again some time. Hopefully he'll continue to engage with the contestants as well as he did then. Perhaps even get them to help out with the impressions again.