Voice Overs Can Become The Character
Becoming dejected or disenchanted will not assist you as a voice over artist to get any further in the business. Take all rejections and improve upon acting skills, character voices, and commercial voices. Your voice overs can also invent and draw their own character, in order to truly identify and become that character.
Ask the producer/director questions as to what needs to be done differently and understand that a casting director picks another talent for specific reasons, and the only thing to do is to keep practicing and understand what directors are looking for. Don’t become unenthusiastic about it. This is a fun aspect of the entertainment business, and it DOES take work. Keeping that optimistic attitude will only help!