Could never stand Rose, I nearly wet myself with elation when she got trapped in another universe from which she could never return... but then again, I also felt excited when the exact same thing happened to Mickey several episodes earlier and yet he managed to come back. I haven't seen all of season four yet, but I know she pops up repeatedly during that season.

Martha was so much more enjoyable of a companion, and way more competent. So far I am actually really enjoying Donna, she is annoying, but in an intentional comic relief sort of way that I don't mind so much (Doctor Who really builds up your tolerance for annoying BS).

I've seen one Matt Smith episode (The Beast Below), and I have to say I am completely sold on the redheaded Scottish girl. She actually came off as pretty smart in that episode, but I keep hearing talk of her being an extremely stupid and shallow character, so maybe I won't end up appreciating her as much when I actually get into that season and watch it from beginning to end.