2003's Fullmetal Alchemist Had Much More Compelling Villains Than Brotherhood

The changes that the 2003 Fullmetal Alchemist made to the story turned the Homunculi into three-dimensional villains.

Fullmetal Alchemist (2003) (Anime) - TV Tropes

Finished FMA: Brotherhood around 4 months ago. A friend told me to watch the 2003 anime. I loathed the second half, so I ended up buying three artbooks of FMA 2003 concept

15 Reasons Why FMA 2003 Is Better Than FMA Brotherhood

Which artstyle do you prefer? : r/FullmetalAlchemist

Fullmetal Alchemist Brotherhood Anime Showdown

Fullmetal Alchemist vs Fullmetal Alchemist Brotherhood – Objection Network

MyAnimeList.net - Fun fact: Fullmetal Alchemist is the ONLY series on MAL to have both its source material and anime adaptation above 9.00 in score.

Fullmetal Alchemist: Differences between the 2003 Version & Brotherhood

Fullmetal Alchemist 2003 Homunculi / Characters - TV Tropes

Weebservations

15 Reasons Why FMA 2003 Is Better Than FMA Brotherhood