I like FMA the best because I got wrapped up in an interesting story with engaging characters. There weren't any characters in the entire series that I completely disliked, especially since it was pretty clear that they all had a rich history behind them.
Soul Eater, hands down. The only thing is that the overall point of the anime as based around courage, which really sucked. Oh well, great series, FMA is second on my list.
You can't go wrong with Soul Eater, but my all time favorite anime/manga goes to... wait for it...
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Air Gear!!!
Its the best series ever, in my opinion.
It was a tough choice between Fullmetal Alchemist and One Piece but in the end I had t choose one so I wen't with One Piece. The only reason being no Fullmetal Alchemist character has got anything on "Fire-Fist Ace" NO ONE!!!!
Fullmetal Alchemist. That's the best anime ever (aside from Cowboy Beebop).
But for manga I like...
I dunno. I really like OP, Naruto, and Fairy Tail.
But FMA is still the greatest XD