Board Thread:Warhammer 40k General Discussion/@comment-25618639-20141206200938/@comment-25895989-20141222153437

What is important to remember is that the canon states that each Primarch is a combination of nature AND nurture. The Emperor "father" did indeed infuse Leman with canine DNA to enhance aspects of his nature. But then the Chaos "mother" whisked him to the death-laden ice peaks of Fenris, where are there no wolves, natively.

Like any child, the primarchs are products of both halves of machination.

So Konrad was probably geared up to be a law enforcer, like the Arbites,but was corrupted into his Batman vigilante state by his experiences.

The main thrust is that primarchs from both sides were altered to be either poor fits or moved to entirely other roles due to the "mother's" interference. I feel sons like Leman and Roboute came out precisely as devised initially. Horus too, most likely.

Konrad, Magnus, Mortarion, the Lion, and Lorgar are probably the ones that deviated the most from the original plan.

Others like Vulkan, Jaghatai, and Ferrus fall close to their marks with some decided deviations (perpetuity, isolationism, & self-flagellation, respectively)

Angron is a special case, because he was outright broken by his 'mother's' influence;  he was the only primarch to fail on his own world, and actually turned and rose to daemonhood just to escape his fate as a victim of his mistreatment as a child.