I originally with getting just a mixed flock with hens for eggs. I didn't know anything about anything. Then I wanted to add more and started looking at breeds and reading them. I spotted the Black Coppers and what stood out was the rich deep copper against the black in the hens hackles, but the roo is much more (yard candy). 2 of my favorite colors, Black and Mahogany, close to the Copper. And I dove into the worm hole I started learning their deep history and how they lay the darkest egg of any other breed and it's actually scored. This got me hooked on the Marans and I wanted to build a flock.
Having the BCMs and a mixed flock is kind of the best of both worlds, I have my flock I can work towards SOP and then the mixed flock to play with egg colors to darken Olives mainly.
As I continually learn more with help it just keeps getting that much more fascinating to improve my birds, learn what works and what don't thru balance breeding and strive for that perfection and darker eggs.
With getting the BBS Silvers they're not a recognized variety thru the American Poultry Association, but they follow the same SOP as the Black Coppers. 2 varieties I now have, same SOP.
Well said... Great explanation !!