I wasn't too impressed with Chastity when she was on Celebrity Fit Club a while back. It didn't seem like she was very committed to the whole thing. I hope that Chaz will work harder, even if he doesn't necessarily have the skill....something we won't know until the show premieres. I worry about him because of his weight, which is much higher than on CFC. I think Lacey is a good partner for him though. Hopefully, she can make it fun and Chaz'll stick around for a while.
My favorite this season will probably be J.R. though. He's just a fighter. He turned what could have ended his life - many would contemplate suicide - into something positive. I read an interview with him and he said something like "I used to be a mess, but not I have a message." He wasn't such a good actor when he started on AMC, but he's really improved. I think he'll definitely have a great attitude and a good work ethic.