Final Fantasy Tactics is probably the game I've spent the most hours of my life playing. I have a save file somewhere that I don't think I quite finished, but it's close to being an "ultimate" file with all the items in the game. I think I was stuck working on getting the FS Bag, for which you have to breed a monster that doesn't normally exist in the game, and then poach it, which gives you only a %10 chance of getting it.