Sam's voice acting has been bugging me for a while and I wanted to see how everyone else felt. Now it's not the voice I have a problem with. I can accept it as Sam's voice, despite a preference for the Hit the Road voice. The problem is the acting. Everything Sam says, whether he's exited, shocked, concerned, or otherwise, is said in the same flat, indifferent way. It doesn't even sound like David Nowlin is acting, but just reading his lines. I find this odd as he was quite expressive as Fone Bone, and I know he can do the same in Sam's voice, as he did say one line in Ep 3 with excitement (but only one line). For a game where dialog is so important, this half-hearted performance really detracts from the immersion, and can ruin a lot of the humor.
Another thing that isn't helping is that Sam's voice is also a bit quiter than everything else. In one scene in Ep 3 where Max's voice was too loud, I had to turn up the volume to cleary hear Sam. If I get bored and have some free time I might record some samples that really show what I'm talking about.