Disagree with this. IMO none of BB's supposed charisma shines through in Hayter's performances. He might as well be the same exact empty shell that is SS.
Listening to that clip that was posted I do think it's a bit gravely/choking/smoker cough sounding. I'm not saying I have loved the progression of Hayter as Big Boss. I'm just saying that I really do not like Sutherland and don't get what the point in changing it is. Unless the point is them meeting/talking to each other in a Metal Gear 1 remake.
And even if that does happen, I still think Sutherland is not really good in Ground Zeroes. I have nothing against him as an actor either, he just doesn't seem to be doing anything other than reading the lines in his own voice.
EDIT: Anyways, I think I've discussed his voice enough. I love the game and can't wait to play more tonight. This thread has so many tidbits of information that I never would have thought of even trying.