Frankly, I think VII is vastly overrated. Terrible plot, boring antagonist, bad combat, the characters lack any personality after Disc 1, and the only title worse than VII is VIII. HOWEVER, the music rules. Yet the game still holds a soft spot in my heart.
My favorite would be IX. Huge throwback to the NES/SNES games, goes back to the "Each character has an actual role in combat" that hadn't been there since IV, and an interesting plot with a few turns.
Although the best... I have to give it to X. It was a big achievement for the genre, with all that it accomplished: Voice overs, the cinematics, the plot is the best (in my opinion), but it also maintained the turn-based system that defined the JRPG. Plus, I love Blitzball.
[Expletive deleted at request of Gamefaqs] P.o.I.: you may know me as; "Zanzibar Man", "----824", or "Sam Yargo".