Probably one of the best series' I've ever seen/read, and it has the WORST dub I've ever seen. I'm not saying this just because, either. From a purely neutral standpoint, the Japanese version better reflects the characters more.
I know... But the dub from D.Gray-man isn't the best out there... I know I shouldn't judge it fully... but the clips I've seen made me go "o_o what happened here?"