Also, spirits are relatively simple in that they embody a certain virtue, and everything that is good and bad about it.
Like the whole concept of 'justice.' Justice as a virtue is cold, uncaring, without mercy of any kind, and is equally unforgiving of all. If you live in the mortal world, and we all do, we are all members of some sect that has wronged another, whether we did it or not. There is always going to be someone who was victimized by some group or another, and they may blame the whole group as a whole. We see this in Justice and Anders when it came to templars and the Chantry. Justice possessing Anders made him care about the justice for mages and wish to act, and all those complicit in any injustice became viable targets, whether the individuals within those groups actually did or did not involve themselves in it. And just as Anders blew up a Chantry, so too did all the mages get punished collectively as a result for a crime none of them did because it was a mage who killed the Grand Cleric.
Valor in the mage origin is all about glory in battle (like Cailan) and openly advocates testing mages in skills at combat, whether against each other or him, and actively creates weapons for his 'need for combat' as he wills that need into reality. He would readily duel anyone if it meant showcasing valor and glory. Say he got sundered from the Fade and was in the real world, chances are he'd challenge everyone to a duel or engage in open combat, or encourage others to fight all in the name of valor and glory, because as a spirit of valor that is all he embodies and represents. He would be a very dangerous spirit to be let loosed into the world, even though his virtue is considered a more benevolent one.