I honestly don't want a remake for the reason Dice mentioned. Maybe the emo generation (that hopefully only lasted a few years) was felt more keenly in Japan at the time Advent Children was developed, but I cannot stand Cloud, or pretty much any character in that movie. And I agree if the creative direction in a remake made the characters as mopey as they are in AC then I'm definitely fine without.
That and I don't think it really necessitates a remake. The graphics are definitely dated, but they don't look as terrible or as murky as the graphics of FFIX. And I'm fine without voice overs. I think they should just leave FFVII alone, and that includes sequels/prequels.