Not sure why you started a new thread but anyway...
I would say just go ahead and play the games you like.
Bioschock2 will most likely take less time to complete than the RPGs, so I would take on that one first. Next, I remember from earlier posts that Star Ocean 4 is indeed boring at the beginning but gets exciting as you go through the adventure. The same goes for FFXIII.
I personally hate to leave a game unfinished and start another.








