I go for FFIII's, personally. Mostly because I'm so happy it finally has a logo to go with the others, but it's a pretty engaging image anyway.
Quote Originally Posted by Lookout Zeromus_X
Were the spin-offs' logos done by Amano? I know all the main-numbered series' logos are by him, but what about the spin-offs?
Amano didn't do the spin-off logos. By the way:

Final Fantasy Mystic Quest
<a href="http://www.ffshrine.org/before-crisis/logo/before-crisis-logo.jpg">Before Crisis: Final Fantasy VII
Dirge of Cerberus: Final Fantasy VII