I just watched Benjamin Buttons last week. It was great in many ways, but it was also a rather sad movie throughout. Really long too (2 3/4 hours).
That I've watched recently...hmmm:
Traitor (great movie)
Kung Fu Panda (loved it)
Forgetting Sarah Marshall (loved it)
The Day the Earth Stood Still (liked it)
The Love Guru (liked it)
Tropic Thunder (liked it)
HellBoy 2 (not as good as the first one, but I still liked it)
I tend to forget the ones I didn't enjoy.
Looking forward to Twilight, The Clone Wars, & The Mummy.