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

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