I've played FF13 and wanted to love it dearly because I had the special edition xbox to play it (with a Lightning face plate and everything. It's since been sold.) There was a lot at stake if I didn't like it. So I tried very hard. In the end, it wasn't a terrible game. There was several times I impulsively shouted, "this is the best game ever!!" because the story gets very interesting somewhere down the line. Then it trickles out to nothing. So, I've played much worse, but it is easily the worst Final Fantasy I've played. There's always a big disconnect for me when I first play a FF game between the engine, the characters, the worlds ... but I always find the beauty in them as I learn to become an expert at them. By the end of the game, I fully grasp the stakes and feel as if I am putting everything I just learned to the test, and I always feel like I've only grazed upon the potential of what was given to me (when I'm on a story-rush, I don't max out chars or do every side quest).
With FF13, I continued to feel a disconnect to absolutely everything throughout the whole game. I even stopped playing it when it became open-world. It wasn't fun. I didn't even want to know how the story ended, because everything I found interest in had been somewhat concluded or stupified. And when it did end, I didn't care.
I have no idea who the last boss battle was, because I don't even care to remember! And I know some characters "sacrificed" themselves at the end, but even that was just so "whatever" that I'm surprised at myself. Add to that, every character story thread that wasn't closed already by the end was just ham-fisted into the ending FMV really quickly. FF endings have always stuck out in my mind as being some of the most beautiful conclusions to stories I know. Even FF12's was remarkable. This one ... no. =\
In regards to FF13's linearity: it is. It didn't bother me at first, or even for a long while. But it finally boiled over when two of the characters are in a bustling metropolis city ... and I couldn't do anything but walk to the next FMV trigger point. It was so painful to walk over to a merchant standing by an interesting cart and click and have it do absolutely nothing. And I kept walking around trying to talk to people and just
do something even though every time, it was in vain. After that, I really couldn't forgive or overlook this major problem for the game. It's borderline offensive, given that it came from a series that very much let you interact with most everything.