The gameplay really. It just has a very addictive quality to it even though the sRPG part is downplayed. I definitely would not mind to see a remake/sequel (not really sure how a sequel works out with this) with more refined game mechanics. The story is just very loosely stitched together, and the main campaign probably has less than 5 minutes of cut-scenes and dialogue to explain what's going on. When you get right down to it, its just a really long (but enjoyable, though hardly the 20 hours they promised) tutorial.
The way the character acts themselves is also a bit of the fun, as well as learning about their historical counterparts (though that part isn't really something you get from the games)
The way the character acts themselves is also a bit of the fun, as well as learning about their historical counterparts (though that part isn't really something you get from the games)