Kuja...because he is the best baddie ever and my favorite FF character of all time. His ambitions and accomplishments made a lasting impression on me and not to mention his wonderful monologues and beautiful language. Just an all around respectable villain and FF character.
Edit: O and Locke, Steiner did own the most poweful weapon in the game: Excalibur 2 which beat Zidane's 108-100
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...BYAKUGAN
"If you're strong you live, if you're weak you die, yet if the weak find the will they can become strong!"