I think if we accept that the level of celebrity this time is non-existent, the best thing to do is try to enjoy it anyway based on the personality of the contestants. Which may turn out to be even worse than their "celebrity" status, but we'll find out soon enough.
I do have pre-conceptions about Yvie & Angie (especially Angie) and Richard Reid though, which are going to be hard to overcome.
Basically they are all just people, as annoying and flawed as any one of us, the difference being they have wrangled their way onto a tv show.
And yes, Julia and Chris should not display any bias towards any contestant, especially when it's done just for a cheap laugh.