What Makes a Music Supervisor Unique?

Do supervisors try to have some sort of calling card? Well, the supervisors that I deal with, because just to be clear, I'm pitching music to the supervisors. So if you're hired as a supervisor for a job, and it is a period piece set in the 60s, you need to be knowledgeable about that era,. The best music supervisors do have very taste, but not all supervisors have that.