One of the greatest things about FMA if we move away from stylistic features or the story itself is the characters. The narrative itself is great, in that it is epic, funny and deep but it's made even better by a colourful cast of characters.
Unlike many shonen (say Naruto or Bleach) characters are strong irrespective of gender, the female characters are just as badass as the males.
My thanks Geordie Green Lantern. Today I approve of: Techniques passed down the Armstrong line for generations!