Well both are pretty cool in my opinion. Wait mode is easier because you won't get bashed up if you don't do anything for a certain period of time. Final Fantasy X was really good because of this, you could leave the game running and not do anything and the enemies wouldn't be able to hurt you. Active mode is a good challenge because you can't waste time with attacking the enemy. They'll attack randomly and you have to be prepared. I have only played a bit of Final Fantasy X-2 lately and I have been enjoying active mode so far. You can't leave the game for a couple of minutes and come back otherwise you'll notice that your characters are dead. I have done that a couple of times...
