I desperately need to know (for no other reason than for my own amusement) if you prefer the brotherhood version or the '03 version of Fullmetal Alchemist and if you have read the manga

I personally belive that although the brotherhood version is thecnically better, the original adaptation does a better job of introducing viewers to the world and the characters and developing the relationships between said characters which makes the emotional gut punches hit harder

Depends what you want from the show.

OG Alchemist is good if what you want is to hang with your favourite characters as long as possible and ride their whole ride with them.

Brotherhood is technically better written and better paced but it doesn’t scratch that hanging-with-your-besties vibe in the same way.

If you are there for the characters then definitely OG, if you are here for the story, definitely Brotherhood.

I also remember being more shocked by the ending revelations of OG than I was Brotherhood but that might just be because I was younger.