It wasn't his best but it definitely wasn't his weakest (in my opinion), but you really didn't think they should be made into movies? Not criticizing, just curious about reasoning, I thought both adaptations had their own strengths and weaknesses.
Also, I voted Rooney, she was perfect.
Again, not to say they were bad films, I just think Fincher has a very high standard to live up to, and that he's much more interesting when he's not directing franchise remakes (especially considering the fact that he's made his two greatest films in the past ten years). As for the books, after seeing two versions that really didn't do it for me (of a book I quite enjoyed), I stand by my statement, at least for Dragon Tattoo. There is so much going on in that book, so many little nuances and plot details that get lost in translation, and what is left just isn't that exciting or effective. I think Fincher and co. made about the best adaptation that they could, but it never really drew me in, compared to the book, which I couldn't put down for two or three days.
But Mara was perfect. The film pretty much hinged on her performance, and she nailed it.