Don't get me wrong the "Ghost" is a funny and has some decent punch lines, but he never talks after the Story, Adding your ghost talking when you die or saying nice kill, May be a little bit better on my part. He doesn't talk during Raids, or Strikes Barely.
I think the "Ghost" should talk more often and be involved on Destiny more than it already is.
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I'm betting they'd have to pay Peter Dinkledge a truckload of cash to put up with more of the criticism he got from his last stint of voice acting for Bungie.