I often see producers wanting a conversational tone in the voice over. One part of that is lowering the volume of your voice. Don't shout at the microphone! It's designed to amplify your voice.
And remember, we speak in phrases. Usually, somewhat deliberately, as we think about how to express our thoughts. When reading copy that calls for a conversational delivery, don't go racing through it without pauses. A road runner approach doesn't work for conversational.
I do a lot of educational and training narrations. Using a conversational delivery is spot on.
Here is a link to an online tutorial I voiced having to do with publishing and plagiarism.