I can relate to Lollie's feelings. So much of GF had personal touches (minus the crime of course) of true Sicilian customs/ways. I won't repeat Lollie's post, but will simply say next to the great story and acting, that's a definite "draw" for me.
I know in another section here someone once asked if only an "Italian" should write the new GF novel. Well, of course, it only takes a good writer and story to make a good novel. However, I've always thought that these extra touches that Puzo/FFC added to GF are generally known only by those who have lived the "Italian (Sicilian) life, or one who has been very close connected to it. It surely enhances the film and gives it more ethinicity. IMHO.
TIS