The problems with the dialogues can be fixed in localization, remember that what is corny for us is mega cool for japanese. The plot development is really a problem, but, any 3d FF had a great plot development anyway, don't remember ix, but VII,VIII, and XII were weak in this area. Hard fans of FF, i can argue on it.
VII-Great start, had pretty deep feeling when fighting a company to save the world and a great metaphor with the system we live, they had to fight with the company to save the planet. But, changing the focus of the quest from the greedy of Shin-Ra to the madness of Sephiroth really fucked it to me.
VIII-Silly plot, whitout depth and pretty strange way to show the villain. They just talked about Ultimecia in the ending of the first CD.
XII-No need to argue in this one, really.
X and X-2 are the only ones that had a plot that holded up from beginning til the ending.X-2 was great to show Spira after Sin, and a soft-spirit world, and gave the happy ending Yuna deserved.
And I loved all of them anyway, relplaying FF VII now. But, that isn't because I love than i can't see what they did wrong.
Essay Pro