Knowing ones limitations is key in this business...and with that, I have mine. Because I have a lower womans voice my voice overs are very effective if you are looking for friendly, warm, sultry, personable, professional or 'connecting'.
On the other side of that, if you are looking for the 'I'm so excited I think I'm gonna pee my pants' type read...I'm probably not your gal - the lower voice just doesn't lend itself well to that! I will mention this in my favor, my current clients comment and appreciate my ability to read copy with the effect that I am talking 'to' the listener instead of 'at' them. And anyone in marketing can appreciate the value that brings to the table.