I agree with you on Simon's voice actor. I liked his VA in the talkie version of the first Simon game, but then (for some reason) they swapped VAs for the sequel, and also decided to change Simon from a likeable jerk to.. well, just a jerk. Simon 2 is a pretty good game as far as gameplay goes, but I have difficulty playing through it since there's quite a few moments when I'd rather punch Simon in the face than help him along on his quest.
As for Simon 3D... yeah, I'm not going to touch that game, but I applaud you for having the bravery to play through it. Maybe if they had gotten Chris Barrie back in to voice Simon it would have been slightly more bearable, but no, they had to stick with that guy from the second game.