My list:

1. More depth of characters background (don't care if there is new scenes... just don't remove anything from the OG... story is flawless, FLAWLESS!!!)

2. I agree with interactions with characters during battle, dialogue or perhaps random events.

3. Voice actors would be neat... but it's like reading a book then watching the movie of the book, you create original looks, sounds and etc from the book to have it come crashing down on you in the movie. (For me it was Harry Potter, in my mind they did have British accents... but they sounded different to me from the movies and it took a little while for me to adjust it)

4. Make it look more modern in graphics, but keep it original as possible and don't add any wacky trout that'll trigger me. (I'm not an angry guy, but you don't mess with the classics)

5. *Death Stare* Do not make the optional/secret characters, rare weapons/armor/relic/espers/etc., DLC... do not make me buy the content in a remake that I can get for free in the OG by grinding and timing... you will get an angry letter.

Overall, I would love and enjoy a remake of FF VI, but if they muck it up I would be way less inclined to purchase it... until it went on sale and even then I'd be hesitant to play it. You just don't mess with the classics man.... I mean, dammit man you just don't.

*sit's in corner, slowing rocking self to sleep*