Thanks, Armando, Bjørn and Akira, for your comments.
#4 is that from a forest cutting field? It has a strong graphic potential.
Snow scenes can be tricky to expose and it's easy to make they on the darker side, which hurts the snow rendition unless there is direct sunlight to it.
Yes, the last two images were shot in an area of recent clear-fell. I've shot there numerous times, including when the timber was being felled. And I agree - rendering non-sunlit snow is tricky - I may not have got it quite right here.
Heavy snowfall again here as I type this.