Argrath deliberately looks to the left, in order to show that he is an unfettered by the past and open to the new. It hints at draconism, experimental heroquesting, etc., but also signifies that he has seen the world and does not fear.
As an aside, I consider this a pretty definitive take on what a Sartarite prince looks like. Which means this is what your Orlanthi rune lords aspire to look like!
It is hard for me to think of a more world-traveled ruler in the Third Age than Argrath. Dragon Pass, Prax, Teshnos, Teleos, Maslo, Fonrit, Jrustela, Seshnela, and the Holy Country. That’s a lot of adventuring!
The diameter of the coins is based on the status of the Prince. Big coins mean the prince managed to become King of Dragon Pass.