As Ross and Rob already said, you need someone who isn't afraid to let go. I've used friends in the past and some are great while some are not so good, but it's all down to whether they have the confidence to let go. Some of the best comments I ever got about Tennis Babes was a review which praised the quality of the professional voiceover doing the commentary. Which was unprofessional ( in every sense of the word ) me.
If you lack the confidence to let go, then just do one voice, your own. If you have confidence, there's no reason not to do more. Many AAA games with high budgets and professional voice actors still have each actor doing several characters each.
If you lack the confidence to let go, then just do one voice, your own. If you have confidence, there's no reason not to do more. Many AAA games with high budgets and professional voice actors still have each actor doing several characters each.