I haven't played the other games besides Tactics and Tactics Advanced. I own Vagrant story, but never played it much. The thing with 12 is you have to be up for side quests or the game isn't much. Storyline isn't all that great, but the side quests are awesome. There's so many things in FFXII thats hidden so I suggest you get the brandy guide and look stuff up online if you are still lost.