What was unique about Scrubs?

Context: Scrubs focuses on the unique point of view of its main character and narrator, Dr. John Michael "J.D." Dorian (Zach Braff) for the first eight seasons, with season nine being narrated by the new main character Lucy Bennett (Kerry Bishé). Most episodes feature multiple story lines thematically linked by voice-overs done by Braff, as well as the comical daydreams of J.D. According to Bill Lawrence, "What we decided was, rather than have it be a monotone narration, if it's going to be Zach's voice, we're going to do everything through J.D.'s eyes. It opened up a visual medium that those of us as comedy writers were not used to." Actors were given the chance to improvise their lines on set with encouragement by series creator Bill Lawrence, with Neil Flynn and Zach Braff being the main improvisors.

Answer: Most episodes featured voice-overs done by Zach Braff (who stars as the main character, J.D.), as well as the comical daydreams of J.D. This opened up a unique visual medium that the comedy writers were not used to. Also, actors were given the chance to improvise their lines on set.