Balthier, as a pirate, should've had a Liverpudlian accent. You know, it's English, he specialises in stealing, it would've been perfect. Especially if he'd referred to Vaan as "ahh kid."

Having said that, Balthier was very well done and I didn't have much a problem with any of them. Ondore always made me smile a bit though, because it just seem a bit of a funny voice. German accent or something? As Swan pointed out, Gabranth was also well done.