Dottore is a very wise, experienced and pleasant person. He behaves coldly and aloof with unfamiliar people, but why should he waste his energy on them? Although he is narcissistic, he knows the measure, and will not treat others too badly, although it is difficult to catch his good attitude. 
Pantalone looks like a calm and restrained person. You often don't see bright emotions on his face, except for a slight smile. If there is no need for this, then he does not show excessive feelings. 