Voted for Cyan, but I prefer a tier system, since it's so tough. In no particular sub-order...:

favorites
Sabin
Edgar
Cyan
Celes

like
Terra
Strago
Gau
Umaro

indifferent
Setzer
Mog
Gogo

dislike
Relm
Locke

Shadow's kind of in his own category. I both like and dislike him. Kinda...