He kept Christopher Randolph as well for Huey. I think it was just particularly he never got over not having a celebrity voice Snake. He wanted Kurt Russell as far back as MGS1, but it wasn't until V that games got the budget and reputation to make it happen. I don't know how we ended up with Kief though if I'm honest, I'd love to know how that conversation went down. I'd also like to know why Kojima was retarded enough to cast a big name actor and then have Snake have about 5 minutes total dialogue (with some additional dialogue even being cut, i.e. talking to Paz)