Cody Bonds is doing a series on each of the playable factions.
I find it interesting that he draws a correlation between the traits given with a playing style. For those of you not familiar with Weiqi* (it is the game they are playing in the initial trailer), it is said that one's playing style is directly related to one's own traits and personality. It is a little incredulous to believe that CA did this on purpose.
CAO CAO
SUN JIAN
LIU BIAO
YUAN SHAO
As he adds more, I will edit the OP.
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*In case you are wondering, yes, I do play weiqi. I play on KGS server as Pike.