Board Thread:Warhammer 40k General Discussion/@comment-94.3.72.36-20131224225315/@comment-6078851-20140511155559

i agree that angron wasn't stupid or inept, he was still a primarch all of whom were the physical and mental pinnacle of human bio-engineering. insane, however, he most definitely was, but that was a result of the butchers nails.

like most people who are insane he was still capable of rational and lucid thought but i doubt he was ever truly clear-headed, except when killing, after implantation of the nails: his mind was continually under the strain of the nails' impulses, a strain that was only ever sated when killing. the longer he suffered from the nails the less rational he became and his periods of lucidity started to occur mostly in the nails' kill-lust, but eventually he degenerated to nothing more than a rabid dog waiting to be un-leashed.

despite all that he was still a primarch, so his demeanor may have seemed more rational and lucid to others than he actually was, but from a primarchs perspective he was 'unbalanced' to start with, and eventually utterly bat-sh*t crazy :P

there's a few primarchs who could be considered to have been insane in one way or another (like lorgar), but angron had an excuse - the butchers nails. his insanity came from without, whereas kurze's (or lorgar's) insanity came from within.