The entire campaign of the second expansion pack revolves around how nasty the demons are and how all the other races unite to destroy them. It's a very touching story. I was particularly moved by Aranthir – he's the epitome of nobility, a gentle and fluffy necromancer. I think it's very unfair to the demons. Why should demons suddenly become outcasts among the equal races? And I always play as demons (although I often play as other races for variety). As for the least favorite race, the mages strongly resemble Wahhabis. But overall, I like all the races.