I adore science fiction, but the only series I've ever read through (as in, read all the books in said series) is the Space Odyssey series by Arthur C. Clarke. Now I want to read something with a bit more grit to it, something a bit darker. I've been looking at two sci-fi authors and their series. The first is Iain M. Banks and his Culture series, the other is Orson Scott Card and his Ender series. Has anybody read any books from either series? At a long shot, has anyone read books from both series and developed a preference for either??