Hi David - Yes, with voice over it is about using the right narrator for the right project. One type of voice doesn't necessarily work for every project - even when it's otherwise a good one. It depends on the subject, style and audience of the learning package. Very often, the subject experts themselves, like many of you, can be the best people to narrate E-Learning projects, where conviction of the subject knowledge of the subject shines through and is engaging - providing the voice sounds right, is confident, projects well but doesn't detract from the learning. Those that can do it well and effectively would definitely enhance the course.
When needed, professional narrators can be used of course. I'm not submitting my own showreel in this thread as that's not the purpose of this exercise, but I hope my thoughts help :>).