I agree with a couple of previous posts. Avgas would be a great one as well as Airshow. It could be a combination of smoked turkey legs, airshow smoke, babes wearin sunscreen and sweat. Plus you would have the great smell of the warbirds in there. Another scent that I always liked, was burnt RC aircraft gas. That hint of oil and burnt fuel is awesome. Would tick of the wifey, but who cares.