I think Bob exchanged Smurfy for Snarky the season Jillian came back (after the disastrous Kim season). I may be wrong--this is the first season I've watched in a long time. I quit watching when the contestants started being so mean and Bob seemed to be passively aggressive right along with them.
I like this season because it seems more inspirational--and I love this journey that John is on--but if it turns mean again, I'm done watching for the rest of the season. It is overlong as it is and I can find other, more productive, things to do.