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.

7 Full Metal Alchemist Villains Fans Wish Were Heroes

For people who say Arakawa didn't like 2003's ending and wasn't influenced by it at all : r/FullmetalAlchemist

Neither Are Perfect: FMA 2003 vs FMA: Brotherhood – Mechanical Anime Reviews

Blast From The Past Review – Fullmetal Alchemist Brotherhood (4.6/5) [Comic-Con Special] – Rated EJ

Fullmetal Alchemist 2003 — Official Character Profile: Halling Artist

Fullmetal Alchemist 2003

Fullmetal Alchemist volume one Analysis and anime comparison: comparing the introductions

Fullmetal Alchemist vs Fullmetal Alchemist Brotherhood – Objection Network

Full Metal Alchemist anime IS BETTER THAN FMA: Brotherhood - Somebody said: Okay, I've never really been into anime, and I just got into the original FMA about 2 years ago, and

Dante, Villains Wiki

Fullmetal Alchemist Brotherhood: All The Main Villains From Weakest To Strongest