I'm a huge Fincher fan, but Gone Girl didn't blow me away. Performances were good, especially Pike and Perry. I'm not sure if it was the photography but it came off a little dull.
Loved the book, loved the film. But Affleck needs to stop skipping leg day in the gym. He's suffering from Hugh Jackman syndrome -- huge upper body, chicken legs. This of course did not deter my appreciation of the film, important as this issue obviously is. ;-)