Silence in the Library/Forest of the Dead (Spoilers!)
Just rewatched these two episodes and have completely changed my mind about them. Whereas the first time I watched, I loved the first episode and was a tad disappointed in the second. This time around, I find myself much prefering the second part. It is so different and although the pace is nowhere near as eciting, the plot and the emotional content is so much more rewarding. I found myself being genuinely moved by the separation of Donna and her imaginary kids and not-so-imaginary husband and as for River Song...well, her sacrifice for the Doctor and CAL and those saved in the Library was heart-breaking the second time around.
This may have something to do with (spoliers in white):
The fact that River Song is returning next series and that we get to see the beginning of this relationship and that this whole story was a set up for something that Steve Moffat has planned in the future...
Yes, how a year can change one's perspective.