People come to the art of voiceovers from many different backgrounds. There is a lot of training required to be a model an actor or a spokesperson. There is also a lot of training required to learn how to get work. People who are doing casting in any of these related fields appreciate talent that is well trained and professional in related disciplines. They are especially aware of talent that understands boundaries and how to relate to the people who are running a project. The people in charge have their choice of many talented people, so why should they hire you? One of the answers should be that you are not only well trained, but you are better company to be around.
Generally speaking, people hire people that they like, people who are easy to be around. The bumper sticker advice is, "Don't complain, don't explain, be on time and do a good job."
Being hired is never just about talent. Developing an ability to connect with people in an honest way helps in a major way. The best way to get work is to be yourself, not your nervous self, or your afraid self, but your prepared, friendly self.
