I kind of like Sauromatia. Probably because I like Skögu, the other heroes and their interlinked events. Sauromatia became more fun with Fomoria in the mix.
Shinuyama got a vote. Not sure why, but I like critters of nonhuman stock I think.
LA Atlantis got a vote. Probably because I'm playing them right now in MP. I tend to like the nation I play. Also the Angakut look cute in their annoraks
I'm also quite fond of the LA pythium. Probably because there is more history of religions (and not just myths) than in most nations.