I dislike Cutthroat Bitch a great deal (Amber or whatever her name is). She's ugly, and more importantly, she's not a very good addition to the show. She only serves to fire up the rest of the team, which I do believe is House's job.
Big Love has little to no character development or input (oh, he's a single father black mormon, neat.)
The only people I actually care about are Number 13 (mainly because I like her eyes), Kal Penn, and the boring guy. Plastic surgeon dude is too Jewy.
I do like that Foreman is back. Chase and Cameron being still a part of the storyline, but not involved in the story is great as well. I'm a huge fan of this show.