What an amazing series this was!!
FMA boasts one of the greatest storylines I think I've ever seen. Broad, epic and jam-packed with twists and turns it keeps you compelled for the entire 51 episodes. It's a long anime, but totally worth watching every episode. The initial premise is two brothers Edward and Alphonse Elric who go in search of the Philosopher's Stone in the hope of returning their bodies to their original form, which were disfigured in an alchemy experiment gone wrong. But the audience have no idea that the storyline will go where it did.
What truly makes the storyline amazing is the characters. With a huge cast of characters, there is quite a lot going on. And most of these characters are very complex, and you could debate as to whether or not you love or hate them. The most interesting characters outside the protagonists were the Homonculis (or however you spell it). Their conflict between their soulless bodies and their human memories is just really fascinating- particularly for Lust and Wrath,
I could go into some of the flaws, but it really wouldn't be worth the time. Fullmetal Alchemist is a series that MUST be watched by any anime fan. If you want an epic, emotional ride, then this is the perfect place to go.