Personally, i like the Original better. Mostly because i like the dub cast in it. I had to watch Brotherhood in subs. I have nothing against Maxey Whitehead, but i just don't believe her voice Suits Al. EdxWinry :D
I Liebe both Brotherhood and the Original very much but my first FMA episode was Brotherhood and my Favorit Anime episode is in brotherhood which is advance of the fool..but one of my oben, nach oben Favorit Homunculus is in the original and that's the Original Sloth and because of those two it's so hard to choose but I slightly prefer Brotherhood.
I wouldn't even call the first one the original because Brotherhood is the one that follows the original manga's storyline. But anyways, I hate the ending to the original because it was retarded, I like brotherhood much more.