I'm not implying that he used the same few sayings, or actions, or idiosyncrasies, for every single exchange and appearance that some of his characters make. However, over the course of most any scene you get several occurrences those "personality traits" as the means of character specific depth. (Fisher sayings, braid tugging, chewing on lips, stroking beards, owlish blinking eyes, etc. etc.) Most of the secondary characters and nearly all the female characters are constructed and written in this way.