Over the years I've worked in a variety of media - radio, television, and print. One of my favorites is radio. There are several reasons for this.
Television requires a lot of outside support and is expensive to produce.
Radio production, on the other hand, is comparatively cheap. When I had a daily radio show, I taped segments as if they were live broadcasts. By choosing to produce my own programs, I amassed a fairly nice set of recording and production equipment for my studio and then dropped my completed tapes off with the station for later playback. I owned the production and content, but the rest was out of my hands. Because I not only have the production and content under control, I also, in effect, have a personal radio station as part of my web site.