What do you mean 'the original'? The first anime wasn't really 'original', as in, very different to the manga.
Brotherhood nearly follows the Manga exactly, though I don't like the dramatic lame supposed-to-be-funny-but-not expressions on the characters, like when Maria Ross had to run away with Barry.
I also like the voice actors/actresses from the first anime. But of course the manga plot is far more superior than the first anime.

The characters in FMA aren't as strong to me, but FMA has the best story plot in my opinion.