I LOVE mythology, so i was VERY disappointed. First of all There were exactly 4(!)
mortal citizens in whole movie, so called "Valhalla" was empty place with just few guards, who looks as mortals despite fact, they werent (or shouldnt).
Should also mentioned, that Gods (7?) are tired drunkies and perverts. Who wouldnt love this? And btw, Loki had dark hairs not dark skin, his skin was pale.