What is? The Millennium trilogy?
As I was reading them, I didn't really love the author's style of writing (a lot of bizarre stuff included like a furniture list from Ikea, constant descriptions of sandwiches) or the content at times, especially in the second and third books, what with the whole history of Sweden's govt, spies and all that.
However, Lisbeth Salander is easily one of the most compelling characters I've read in years and by extension made me like the books more than I should.