What breeding charts would you like to see made?

[Cloverr39]

Breeding charts are a very useful tool, especially for people new to genetics. They've helped me a lot over the years. Now I'm thinking I could put my artistic abilities to use and create some visual breeding charts for different colors/genes.
I will likely prioritize colors and traits I personally work with and have experience with, but I'm open to suggestions on what you'd like to see made into a simple, understandable chart. Any specific genetics you've been unable to find existing charts for? Maybe I'll get to expand my genetics knowledge along the way, by making charts for traits I haven't worked with yet myself.

I plan for this to be a fun thing to do when I've got extra time on my hands, so I may not be dropping charts left and right, but when I do make some, I'll post them here.

 

[RoostersAreAwesome]

One chart I’ve never seen is one about comb types, a chart with pea, rose, single, and walnut combs would be useful. Though it would probably have to be labeled, as the combs can look pretty similar.

 

[rural mouse]

V-comb effects would be nice. Polish and silkies are popular, even in mixed flocks. What the comb does when crossed with other comb types would be rather useful.