OMG! Thank you so much for saying this!
I've been trying to put it into words for weeks!!!
It is as if he "REFLECTS" the personality he is associating with at the time. And while he has fallen deep down a well of whining and despair, we would have to account for the negativity he has placed himself in jeopardy with as of late.
With Jade, we all came to love and adore him. He was giving and funny to all the HMs at all times, even when he knew certain HMs (during the marriage challenge were trying to suss them out) he would think of positive ways to re-track their thinking when speaking to Jade.
With Tim, he's the funny prankster without malcontent. We enjoy their hijinks, discussions and laughter.
With Ben, even in the epi tonight, he takes on the role of Gentleman above board and the joys of life.
With the gym rats, he's a man's man, that they can work out with any day of the week and seem to all enjoy his company.
With The HM that he has chosen to bed at night, well now.... ain't this a doozey! The more she administers her Succubus powers, the weaker and weaker he becomes. To the point where he is whiney and has no self respect.
The "chameleon" factor must work well for him in reality outside the house. It did inside the house, till the different personality factors started colliding. And as a Chemical engineering student, he knows that no good can come from negative and positive forces being placed in direct line of each other. THIS is where his personality fails him the most. Unfortunately, he has let the negative take him.