What primarch, or hell Astartes or just legion as a whole, has been flanderized by the fandom/who do you have funny facts about that shatters popular perception? I'll go first.
Leman Russ is only pretending to be stupid and has written multiple books in lore (saw someone say more than Magnus but can't find source)
Rogal Dorn putting his hand on Konrad Curzes shoulder after trying to talk him out of killing some people who resisted the crusade (and Konrad being uncomfortable with Dorns "fake friendship".)
‘No,’ said Dorn, placing a golden gauntlet on his shoulder guard. ‘We are liberators, not destroyers, brother. We bring the light of illumination, not death. We must govern with benevolence if these people are ever to recognise our authority in this galaxy.’ Curze flinched at the touch, resenting the easy friendship Dorn pretended. Bilious anger bubbled invisibly beneath his skin, but if Dorn was aware of it, he gave no sign.
Lorgar (upon having his prayer session with the boys interrupted or whatever) told a custodian "I wouldn't piss on you if you were on fire". Lorgar also witnessed some ritual in which a naked woman is turned into a demon. So Lorgar has canocially seen a woman naked.
Corvus Corax disliked poetry
