Jake because he's good fun, does his bit and seems like a really decent chap to; e.g. when he chose Kendra to join the CIA to give her a break from the trials.
Michael reminds me a little of Tony Blackburn when he was in the jungle, he just needs some logs.
I like that Nadia is willing to get stuck in and give everything a go, she was great on the task with Tinchy. I think she would be good at a Bush Tucker trial.