Dave I appreciate all of the thoughts. Pastels is how I tend to group the lilac, lavender and Buff's. They are paler colors most often and thus fall into pastel for my eyes.
We have greys who as you mentioned show all shades of grey from light to dark and all in between. McGraw (DH gander) is darker than Lucy (DH) goose. McGraws daughters all have very dark grey feathers so far. Lucy had a mix of lighter and darker toned off spring.
Now McGraw was with Peaches (the currently labeled lilac) they produced many grey, some lilac and 1 daughter who so far appears had buff and half lilac (coloring matches her mother) her feathering is better than mom, but completely curly chested.
We are keeping a data base on who we pair, what colors (and variations) they produce. As well as if they should be paired again, or not based on the goslings quality we see as a whole. We track, trace and wing band everyone here so it is easier long term to look up a history on a bird.
We also have whites, a group of 9 to be exact currently. We have a smooth breasted girl from this year I am very happy with as she continues to develop, we kept her as well as two curly from this year.
Anyways, I too hope this conversation continues to be a positive one. It's always more fun to share ideas. Our son is a science major and plans to do some genetics tests next year for an on going science research project. Hoping it can help with the breeding plans down the road, or at the very least make for an informative and fun project for him.
With the whites it's all about type, breed for type, cull for type.
With colors I am inclined to breed towards color keeping type in mind. It does no good to breed a color and have ugly heads, or snake like necks ect. So I personally believe some attention to type need to always be present. I can say we have two buffs I like the coloring on and closely watching looking at them for over all type. The lilacs I am afraid have much more work ahead as I want to see much more feathering to carry the color.
I suspect quality grey will help with the buffs, possibly crossing the split off spring that is of quality to the lilacs and lavenders to improve feather, color and quality. We don't have blues here yet, so not going to add it to the mix since the three colors (buff, lilac and lavender) are enough to cause the brain to hurt.