Unfortunately we no longer have Nebraska plates on our cars, but we lived there when the sunset/sandhill cranes plates were new. Some people said the colors reminded them of a container of "I Can't Believe It's Not Butter!"
I loved the silhouette/sunset/crane idea, but to me they messed up the with the background colors. Instead of that vivid YELLOW/RED sky, they should have used a blue/light purple/light orange sky for the sunset, with the black numbers and black silhouette of the cranes/wetland reeds. That would have been stunning. A South Carolina plate has a new plate that has this beautiful evening sky color in the background. These colors look great on any color car.
Please feel free to use this suggestion, Nebraska DMV! To me the sunsets/skies in Nebraska were about the prettiest we've seen anywhere!
My choice: Any of them. I'd be so grateful to be back in a beautiful area, among intelligent, non-self-centered people again, I would not care which plate my car had! The DC region has a high number of angry, aggressive people.
Nebraska is a beautiful state with great people.