I recognise a lot of Pratchett in this now, after two years of Discworld reading. A lot of themes in Discworld, aka Pterry's viewpoint of life universe and everything, is played out in the wording, plotting and worldbuilding of Good Omens too. It has the parrellel, mirroring and intertwining between sub-plotlines that feature in a lot of later Pratchett's work that I like very much. The difference between the tv adaptation and the book, I suppose, is also reasonable. It is as Pterry wrote in his review of the play adaptation of his novel Nation: the medium changes the story. It would be unfair to say which is better or worse. The important thing is, we can have the best of both worlds, isn't it? just like everyone in this story.