Edge did a pretty awesome article on the creation of Final Fantasy 6, where they interviewed Yoshinori Kitase (the "Event Planner" for the game.) There's a lot of cool insight into the game. For example, the creation of the characters was something the whole team did collaboratively, with certain people focusing on certain characters (Hironobu Sakaguchi being responsible for Terra and Locke, Tetsuya Nomura being in charge of Setzer and Shadow (Of Course! It makes so much sense!) and so on.)

Because of it's applicability to the modern series, this is perhaps my favorite quote:

I miss the limitations of making games in those days. The cartridge capacity was so much smaller, of course, and therefore the challenges were that much greater. But nowadays you can do almost anything in a game. It's a paradox, but this can be more creatively limiting than having hard technical limitations to work within. There is a certain freedom to be found in working within strict boundaries, one clearly evident in Final Fantasy VI.

Definitely worth reading if you're a fan of the series, or that game in particular. Link.