There's a load of different worlds in the FF universe and most of the time they don't carry over to other games.. There have been a few that are linked such as Vagrant Story, FF Tactics and FF12, which all take place in the same world. So for most people, certain worlds are a lot more gripping than others. Personally, I love Ivalice, the world in the games I just mentioned. FF12 is one of my favourite final fantasy games, the combat system is really cool and was (and still is I guess!) quite innovative in that you can set of 'gambits' which are basically AI commands that can be done in a certain order and based on certain conditions (ie, if health < 50%, use heal on target). I'd recommend that one if you were to try and get into it, but you can't judge the entire series on one game because they're all so different!