Maybe i'm not good with accents... that's just how it sounds to me.
Here's an example of the main character speaking in Two Worlds II http://www.youtube.com/watch?v=_JnLiaH_id8. Sounds more American than English to me (I'm from England). Even if that accent isn't American, you can't deny that that small piece of speech says a lot about the character's personality.
Honestly, it really doesn't matter what country the voice actor is from. The point is, not everyone is going to like it if their character is voice acted.
Yes, absolutely. I never want my character to be voice-acted at all in any RPG. Story-driven action games, absolutely fine... but not RPGs.