5. Semantic Error - He is always honest and blunt. He may not know what he is feeling and if he does and doesn't want to say, he says "I don't want to tell you".
6. Shojiki Fudosan - similar premise to the Jim Carey movie Liar Liar. It is a Japanese drama with a realtor instead of a lawyer. Not sure if this one fits since he is an inveterate liar until he does something he shouldn't then he becomes unable to lie.
Great topic! It gets old really fast when people obfuscate, pretend & lie, I understand if they are in a dangerous spot... Although, if these characters were honest, the shows would be a whole lot shorter.