I loved his tones on some funny dialogues. Great choice indeed.

I liked both Letho's and Iorweth's voices.
Letho sounded as if he was so experienced that he didn't care about anything anymore. I think his voice fitted his character.
Actually, I disliked the voices of the side characters (almost all of them, to be honest). In The Witcher 1 they were perfect, but in the Witcher 2 it was liek they hired the Dragon Age and Mass Effect's va and they sounded TERRIBLE.
Sasskia and Fillipa weren't very likeable as well. I want Thaler's voice actor to return, he was great I was very unhappy when I found out that they changed him (for Zoltan, that is). I almost stop playing because of that!

I wish there was a poll to gauge how much people like the voice-acting of the different characters.

Reminds me of the David Hayter cult popularity for voice acting the Solid Snake part in the Metal gear games.

He's become so synonymous with the Snake character at this point that Kojima would be an idiot to not get the guy back to do each upcoming game that has snake in it again.