what is your favourite and least favourite episode of season 2, and why??

The finale is my Favorit and least favorite. It's my Favorit because Rose and the Doctor express their feeling for each other (more oder less for the Doctor). It's my least Favorit for some obvious reasons. If Du hadn't guessed, I'm a huge Rose/Doctor fan!! So I hated that the Doctor didn't get to say I Liebe you. I hated the thought that they would never see each other again. :(