Derek is the best new thing! I only ever watched the show because he added a creative touch to every dance, while (almost) staying within the requirements of the dance. Now, he's the best judge. He said something encouraging to each contestant, and also gave each one something he'd like to see them work on.
My two favorites are Anne Heche and Nev, also shout-out to Justina and double shout-out to her adorable partner, Sasha. Anne gives each dance an actress edge, both face and body-wise, subtle and true. Nev is simply charming through and through, with his movement and gorgeous smile. Justina performs for the audience at home, knowing she can reach us through the camera.
I like Johnny so much also, and I find it oddly endearing that he seems nervous. He likes his coach, and so do I ... and I think he'll loosen up. I don't think Lady Ga-Ga worked as well for him as he thought, but of course she was his choice. I liked his comment in one of the articles
@Sylvia linked that he found out "I like to be told what to do." Coaching!
I hate, hate, hate that they fired Tom. He had the unusual skill of staying on script while also adding in humor that reacted to unpredictable things that happened right then. Also, any reality show is improved by having the ability to make fun of itself. Tom gave DWTS that quality. Tyra stays on script and somehow also makes it about herself.