If you ask me if I am in the like or dislike camp of XIII, I will tell you that I should be in the "like" camp; however, if you ask me which is my least favourite Final Fantasy game, I will probably say it's XIII as well.
I've been a long time FF fan and even though I didn't play all of them, I've liked every FF main series game since VI (I have I-V but just never had a chance to play...) including Tactics. For this series, it's almost hard for me not to be biased as I so strongly like the game. The only two games that I fail to love initially are XIII and XIV.
Unlike some people, I don't have much problem with the casts of XIII. Yes, Vanille's voice can be slightly annoying and Snow could not be more "bro" like, but those aren't an issue with me. At the end, I still care of them and care about their cause. What my strongest problem of the game is the straight corridors fights and then meet the boss at the end style for the first 20 hours of the game. Many had defended it as the story line allows that, but to me, that's just saying "well, of course this game is boring because the game is about a boring guy and his boring life!" That's not a very good excuse because it implies the game's story is flawed by default, which I don't think is the case for XIII actually. A group of people escaping can still get lost from time to time, therefore not completely just running in a straight line. This alone took me a very long time to get used to. Combining with the the seemingly forever handholding and a long time to get to finally having fully control of the AMAZING battle system, I actually had to drop the game for a year and come back to finish, after 18 hours of play through.
I absolutely loved the battle system of the world of XIII. Far as I remember, MMO aside, the three battle system FF that was very awesome to me was XIII, X and XII. I love the no wait for X, the MMO like XII and the quick-change of XIII. I was very happy they kept it for XIII-2 and hopefully it retains part of it in Lightning Returns.
The year off gave me some time to get over the, in my opinion, boring part of the game; and when I picked back up, it wasn't too far for me to get to the open world and open battle system; therefore I were able to really enjoy the game at that point. I learned to like it at the end. I use the word "learn" because none of the other Final Fantasy (including XIV) I had to learn to love them, I either like or dislike (I dislike XIV until Yoshida took over and then the game started to transform. By the time they were about to close the XIV 1.x server, I was already liking the game. A Realm Reborn is an instant love... but that's another topic.)
I think Lightning is a very strong lead. I like her actually more than Cloud and on par with Terra and Celes (and definitely way more than Squall, who I absolutely just want to shove his face somewhere so I don't have to read his dialogue every time I play VIII). I like her, I understand her and I am glad she's back for Lightning Return.
So far, LR shows a lot of potential. I agree with some others that I'm not a big fan of this costume "barbie" part, as I almost find that "cheapens" Lightning a little bit. Yet, I have to say from everything I watched so far on trailer, I don't mind it. The gameplay seems extremely fun and fast pace. If everything is done right and can justify the way she changes all the costumes, I'm not going to hold that against the game. A lot of things are just preferences, at the end, everything boils down to the story, the characters and the gameplay.
Also, yes, guys. Let's be civil here. I've read all the post, I personally don't feel any of the negative feedback about the game was very offensive or really bashing it. I can understand why we defend our favourites, because I surely do, and after all the years of reading a lot of bashing from other forums about XIII I can see why some of you are even more defensive, but please also aware that the people currently postings are not (or might not) be the same people you have been dealing with in other forums; hence there's no need to carry the same burden you had in other forum into this new one. The site has only been up for a very short period of time, it's too early to be all screaming and kicking about things.