mavruda

The original Conan character does not look like Arnold too. Conan is over 6 feets tall, cobalt blue eyes, black colored hair - as raven's wing and is a smart one. The Governator/ well.... the ex governor/ is brown - http://wiki.answers.com/Q/What_color...rzenegger_have. In all his movies Arnold remains silent - probably for lack of artistic/acting talent. "Get down" and "I'll be back" are his common phrases. Conan can be sarcastic - all the time, he may argues, even though he's barbarian, and to convince people with talks.
Jason Momoa is a pretty boy, a model - he has the height, the muscles, but he looks gentle and elegant - did I said a model ? Conan should be more rough, uncouth /but not unhandy/
I guess they chose him because of his portfolio and previous success in movies he did before - he is pretty famous and the guys who played Conan before are now old dudes.
On the audition of Conan there were many guys with imposing physique who were showing muscles and even the exit of their rears / LOL/ so they should get that role, but the producer picked Momoa - he's cool dude.