Tom, you make some real good points.
We are moving to se. AZ in a little over three yrs and know where we'll be living. I've already seen about a dozen common kings there in the Santa Cruz Valley. It's not a Cal king, but I'm interested in doing field work and developing a line of these intergrades from w/c and getting the nicest I can find. That's why I'm thinking about what I'll do in the future.
I'm sure you've seen this example, but I'll put it up again for convenience...

This is an intergrade splendida x nigrita. Notice the head shape, kinda different from the usual common king...has to do with the behavior and habitat, I think. These snakes are somewhat smaller than the ave. Cal king, or splendida, for that matter. There may be other qualities remaining to be discovered too.
Now just think how nice an albino would look alongside that black beauty. I love hypos too. I hope someone posts some pics of those mutations one of these days. Do you know anyone who has them? Thanks,
TC