Having worked with Drymarchon for well over 20 years and currently maintaining multiple pairs of all six of the available members of the Dry clan, I can say with some degree of certainty temperament is more an individual specimen issue, rather then a species vs. species issue.
In general, I believe most folks with a high level of experience with WC and CB specimens, there are many of them frequenting this forum, will agree that Eastern Indigos, Unicolor and Black-tail Cribos tend to be the most docile, though I have encountered a few aggressive members of each of the above species, especially the latter. Texas and Mexican red-tail Indigos are normally even tempered, though some do have a tendency to be more “sheepish” then those previously mentioned and Yellow-tail Cribos, especially WC specimens, tend to be very high strung in comparison to the rest of the clan..
Best regards,
Jeff Snodgres
