I dunno... about the only ones that sounded relatively "meh" to me were the Disney characters themselves like Quasimodo. Most of the Tron characters actually were kinda SUPPOSED to sound relatively emotionless aside from Sam and Qorra. Flynn had the whole zen thing going on and the rest of 'em were all programs. As for the Square characters themselves, yeah... most of the villains who spoke did seem pretty emotionless aside from Braig/Xigbar/whoever the heck he is now, but I think, well, that's probably because those characters are either without hearts (supposedly... >.>) or have messed with their hearts or something, no? No heart = no emotions in the KH canon, so it'd make sense.
As for the translation, well... Idk. Wouldn't know myself. Don't know Japanese enough to understand/translate, soo....
Also there's that whole thing of not wanting to ruin the English version just because of potential discrepancies that might occur in the translating. When it comes to language translations, there's almost always gonna be some minor problems with complex sentences and how they're spoken in a given situation that changes context, especially with the ENGLISH language of all things =b