He's a great villain, but not my personal favorite. He is definitely memorable, and did a good job as blending in as a typical upper henchman for a good portion of the game. He was the first FF villain that wasn't "I AM THE DARKNESS AND I WILL END THE WORLD IF YOU DON'T GET THE DOHICKEYS!!" Since the player saw him grow to a "noramal" insane dude to a ruthless god, I think that's what makes him work and why he is a beloved bad guy.