Its weird. I am with most everyone in this thread. Back when I played FF 12, I really did not enjoy it. I could not stand the battle system, and I felt the storing was on the boring side. The thing is I have read so many threads since then where people praise the game as one of, if not the bet FF ever. Makes me feel like I just did not "get it". I really would like to give it another shot, I think I would give the battle system more of a chance this time.
On the other hand I really have enjoyed Xenoblade. The battle system its much more interactive, and really is a perfect blend of turn based and real time. The music is mostly excellent, and the environments are simply mind blowing, maybe the games most stunning feature. One issue I do have though was brought up by Akanbe. I feel like I have basically been forced to keep Sharla on my team, even though as a character I dont particularly like her. I just really need the healing and no one else can provide enough of it. I am about 45 hours in and I really have not seen much of a solution for this, tough its good to hear there might be one.
One thing both these games have in common though, it takes a person with a strong will to 100% either of them. Its definitely not something I am capable of.