[Yoherz]

The first one I haven't played, so I can't say.
The second one is excellent. Though, it's a lot better if you play the first game first.
The third one I haven't played either, but I've heard from reliable sources that it's very hard and annoying. Not a good one.

The gameplay is similar to that of Final Fantasy, but the battles are totally different.
You run around in areas until random battles happen and such, but the battle system is something all in it's own.
You have something called the judgement ring. when you do almost anything in battle, you''ll have to use it. Like using and item, casting a spell, attacking, and so forth. You can make combos off of your other characters in battle to do more damage, and the more hits in it, the higher your combo bonus damage is. At some points, players can do over 100 hit combos doing a total of around 10,000 damage.