Most recently I watched Transformers 2 for the first time. I liked the first part very much, but this sequel turned out to be boring as hell.
Before that, a couple of months ago I saw Shutter Island. I expected some kind of fantasy/horror mixture, but was very pleasantly surprised with what I got instead. Then again, I had little info on the movie previously, so I had no idea Scorsese was behind it, until the credits started to roll.