Personally, I enjoy 'normal' actors. If a famous actor does vociework, it blows a cannon sized hole in the budget of the game, pending on who and how famous they are.
It's all relative.
I think we had some pretty big names in FNV, but I freely admit to not viewing the same things as mainstream America. I mean, to me, getting Fred Tatasciore was freaking
amazing.
By the same token, we have some HUGE names in HH and OWB. But nobody as famous as Brad Pitt or anything. I'd take ten people like [name redacted] before shelling out the cash for a mainstream movie star.