Hmm, the games so far up for a remake aren't so bad, with the possible exception of X-2 (basically a game to bring back Tidus by the end; everything else was simply faffing about until that). Don't get me wrong, both X (Plot is nonsensical at times, "How'd they get from the bottom of the frozen Macalania lake to a desert halfway across the world?!", the minigames to unlock the best weapons and their sigils were the worst part of any game ever designed and frustrating to the power of infinity) and XII (Plot is too politically centered; the main character is NOT, in fact, the main character) have their downsides for me, but they're not the worst choices for a remake.
...
Ok. I loved XII.
Throw out Vaan and Penelo, gimme the other 4 guys and I'll be a happy camper.
The english voicework was absolutely GLORIOUS (even if I defend that all FFs should have an option to use the Japanese voices with english subtitles, since the mannerisms of all characters work much better that way, it's the kind of thing anime characters do; FF X and XIII were specially bad with this, the "laugh" scene in X sounds better and makes more sense in the japanese version for one).
The airships named after former summons each had a cameo and a part to play, with the more important ones being used at opportune times for the character they portrayed in previous games (what, I liked the analogy =P).
The gameplay did what Dragon Age Origins did, only better and before it was cool, and at that time it played like an MMO that you could pause and micromanage every action your team made (while the target lines allowed me to see exactly who was aiming at what and what was aiming at who immediately, that was great).
The Hunt! I have never seen a secondary questline mesh so well with the main one in a Final Fantasy game (wanna break from the story a little but don't wanna search every nook and cranny for the hidden secrets? Do it for the Hunt). You had to draw out targets, you had to fulfill a mild puzzle in the area for most of them to even show (take out this or that guy, bring these or those guys in your party, search for the target in the rain season, drop a bait here and there, mess with it's things) and you had to fight all of them as if they were bosses each with a different set of moves, vulnerable to diferent status ailments and elements, and with differing win conditions other than "Kill Boss" sometimes. A game full of Bonus bosses! And a loot system that didn't rely on spiders dropping gold, but each monster gave appropriate trophies, that could then be used to craft special weapons and armor at vendors (if they were rare materials) or sell for gold to buy average ones (first final fantasy to try this, and it did it well).
Sorry for the long post, felt like spreading some love on XII. That game takes a lot of flak for some reason, but for me, it was the Monster Hunter you could play decently alone on a good console xD