The thing to remember is the radio and television host is presenting a well-tuned persona that is designed to attract an audience for the advertiser to get the results. Because the person is one way on the air, there may be a bit of 'acting' involved to create that personality. One station I worked, we were to speak to a 35 year old female. We were coached on this regularly. There are things my real personality would say that were not said and my slant was to speak the mind of a 35 year old female...not sure I pulled it off too well being a 28 year old guy at the time. I'm not a 'cocky' guy in real life but I played one on radio at one point per my program director's instructions. I state this because so many believe the on air persona is the person's true personality. Granted, it's really difficult to pull off something exactly opposite of your true personality, so usually the on air version has elements of reality involved. News anchors, for example, are merely reading what the producer or news director approved whether they want to or not, not to say they might argue with the producer or news director.