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

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