I have been doing voices for over 20 years. I currently work in production for several radio stations. One of my favorite commercials that I've done was doing Bill Clinton and George Bush Sr. for a cigar shop...you can take it from there. Most of my experience is in radio.
I have a BBA from the Anderson School of Management from the Univerity of New Mexico. I have not taken any formal classes for voice acting but have been to a workshop about doing voiceovers.
The voice needs to fit the product or event. You need to sell the product or event. When doing character voices, I need to be and feel like that character. It makes the sound more convincing and entertaining.
I am also a professional clown, performing for children and adults which allows me to practice my talent and develop other voices.