I haven't seen green eggs! Maybe that's how Dr Seuss' Green Eggs and Ham came about!
I will use any color of egg, but I only buy organic, or free range eggs. I usually try to buy them from the little farm down the road. After hearing some of the tortures the chickens go through on some of the big commercial farms I refuse to buy eggs at the supermarket.
I've never seen green eggs or speckled ones either. I only see them during Easter egg hunt and they are painted of course.
I don't particularly care either. My family is on the WIC program, so we get eggs for free. I'm not sure if I am allowed to get brown eggs or not. I always just get the white ones.