Who's your favorite character?
It's a tie between Locke from VI and Balthier from XII, both have an aura of nonchalance that I find appreciable and both are ladies men. I love Locke's situation in VI having to choose between two girls and Balthier has the hottest girl in XII by his side. Basically they're two of the suavest gents you'll find in a video game nevermind just the series.
What's your favorite game?
Another tie between VI and XII. XII is the game that introduced me to the series, and I'm not exactly one for the transitional phases or random battle encounters so that was a bonus as well. I loved the story, the cast was great in that it had everything, a walking bunny woman, the typical final fantasy androgynous lead and a supporting cast that has a surprising amount of plot within the story. VI is an absolutely great game, I could easily look past the battle system which I didn't like so much because the story was so entertaining. The cast I think is the biggest to date and I love being able to switch in all the different people throughout the game. The world of Ruin is an absolute masterpiece in gaming, it was so dynamic in terms of plot development, being able to choose who you wanted to find after the world fell into chaos was great and allowed you to develop the story in the way you wanted it to go.
Do you like a particular battle system better than others?
XII's system > any other system.