I can switch between a dozen voices in a session, high, low, gruff, sweet. But when I listen back, they sound like impressions, not people. The director says give me more life and I hear exactly what he means, and I still can't get it into the mic.
More people experience this than they realize.
You can produce many voices, but making each one feel like a real person still escapes you.
If this sounds familiar, the Library can help you find the bigger picture.