I am probably gonna get flamed for this, but I was disappointed with Final Fantasy XII.
My explanation is somewhat involved. Let me use Baldur's Gate as an example. The game has very good gameplay, as it is better to prevent damage than to heal it. Healing spells are expensive, and defensive spells are very effective. Also, offensive spells are so powerful that they can turn the tide of the battle instantly if the right spell is casted correctly. This is balanced by how few spells you can cast and mages are vulnerable to attack, as it will disrupt their spells. Fighters are usefull at absorbing damage and archers are usefull at dealing easy physical damage. Both are necessary at killing smaller enemies not worth one of your precious spells.
Final Fantasy XII is almost the opposite. Healing spells are cheap and have to be casted almost constantly. Defensive spells are moderately effective, but are often necessary, and you still have to spam healing spells. Offensive spells are most of the times useless unless you can find an enemy weak against them, and then they are moderately effective. You are better off just shooting an enemy or stabbing them than casting offensive spells.
All of that to tell you why I was disappointed with Final Fantasy XII. You can see on my games list that I do own the game and I have played it for about 15-20 hours.
