[@CelticSoldier]Hmmmm, that's a hard choice. Cathay is hardly explored in the lore, which 1) makes it interesting, but 2) also means that...well, there's not much info on it. 
I admit I have always been partial to Lizardmen and steaming jungles, however. So I'll say Lustria, though if you make an executive decision and go Cathay, I won't hold it against you and still have fun. 
Lustria though. 

Also my character will be done this week at least. Hard to tell with Thanksgiving haha. Hopefully done before Wednesday though.