The sweet little CA Grays are not rare nor being bred for APA acceptance - only being used as production fowl. But the Breda, Iowa Blues, etc are being worked on for APA approval. Speaking of Iowa Blues they remind me of the beautiful Daisy Belle or Norfolk Grey. Beautiful feather patterns.
I love Legs and BRs but just not for my current backyard group. I've been disappointed too many times mixing assertive breeds with my gentler girls and need to go a different direction. I absolutely adore Doms but not too sure about adding them to my gentle mix in a couple years. It all depends on how well the Breda meld with the Ameraucana and Silkies. The Breda kind of tend to stick with each other or around humans so that's why I want to try them - the hens aren't known aggressors like the Med's classes. As a last resort I'll go with LF Doms since I am very familiar and in love with them. I just have so many pink egg layers that I needed some white for variety. Some of the family wants the pink, some want the white, and we like the blue eggs for ourselves.
We tried the Marans for chocolate eggs but she was a nasty personality in our small flock and her eggs were neither chocolate nor big - seems like chocolate layers are mostly assertive types so we re-homed her. Even if chocolate layers don't lay very chocolate eggs there are still interesting patterns on them with speckles or half-dark/half-light brown, or plain brown ones - however the breeds are mostly heavier, larger, assertive types like the Marans, Wellies, Barnies, Penes, or Empordanesas and we've passed on getting any of them while we have a gentle-natured flock.
Well, the Cal Gray people tend to disapprove of the emphasis on appearance over performance, one shared by some of the Scandinavian National breed registries that refuse to set definitive appearance standards because they don't want appearance to outrank performance.
Cal Grays actually are rather rare. We had a Marans and she was a very aggressive bird who laid darkish copper eggs with dark speckles. It seems that if one selects for dark egg laying, one winds up with hens that don't lay overmuch since there is a limit on the size and productivity of the pigment gland.