I loved FF 7,8,9...found 10 to be decent...hated the guts out of both 12 and 13 and havent been able to finish either of them.
I might be over the whole japanese storypresentation and their silly characters and I might just be tired of their less than stellar gameplay (especially 13), but I found 13 to be the worst final fantasy I have played and a bad game over all.
It has good graphics and fantastic movie sequences, but a terrible cast, a WOEFUL script, a meh-inducing soundtrack, an uninteresting story and the worst combat in any game I have ever played, rpg or otherwise.
I would not recommend it to any other than complete DIE-HARD japanese fanboys.
I have not played star ocean or golden sun, I tried Lost Odyssey but it had a bit of a dull start so I couldnt get into it, but I plan on giving this another chance based on opinions of fellow gamers with good taste.
Will you like it? Only one way to find out, but DONT BUY IT. Rent/borrow and see what you think. Personally I havent been so disappointed since...Prince of Persia Warrior Within, its the ONLY place EVER metal music havent worked.
Edit: Just had to add a bit about the upgrade/leveling system. It has to be the most superfluous system ever created. Its a bunch of shiny crystals with annoying loading times/zooming in, and annoying "hold this button to level that ability" mechanics. Its completely linear and gives you absolutely zero room for creativity. You can choose which of the class"trees" you will level first, but they are always limited so by the end of the chapter you will usually have maxed out everything anyway.