most people probably will vote for FMA, but I liked Berserk more, it honestly had incredible potential and was only stifled due to lack of funding.
So I vote Berserk.
Guts, the original mechanical-armed badass. Berserk.
Tough call but Fullmetal Alchemist Brotherhood.
Fullmetal Alchemist: Brotherhood
I definitely have to go with Brotherhood on this one, though I do want to check out Berserk.