The following is a personality profile of George R R Martin based on his work.
George R R Martin is a bit compulsive, excitable and inner-directed.
He is empathetic, he feels what others feel and is compassionate towards them. He is intermittent as well: he has a hard time sticking with difficult tasks for a long period of time. But, George R R Martin is also independent: he has a strong desire to have time to himself.
More than most people, his choices are driven by a desire for organization.
He is also relatively unconcerned with tradition: he cares more about making his own path than following what others have done. Considers independence to guide a large part of what he does: he likes to set his own goals to decide how to best achieve them.