I don't think I've actuall gone through my list yet:
Great Final Fantasies: VI, XII, V
Good Final Fantasies: IX, Tactics, I
Okay Final Fantasies: IV, III (So far), VIII
Bad Final Fantasies: II, VII, X, XI
N/A: Final Fantasy X-2, Mystic Quest, Tactics Advance
Final Fantasy: I didn't start playing Final Fantasy games until around the time VIII and Anthology came out, so I just played this one recently. It was a fun distraction and overall solid. The customization was fun, but the story was, obviously, paper thin. Tenth one played.
Final Fantasy II: Played this one right after I in the GBA remakes. While the levelling wasn't as bad as people said, it was still a pain. The story was meh and the gameplay was entirely too generic. Maybe if I played it when it first came out, I might have enjoyed it, but not in this day and age. Eleventh one played.
Final Fantasy III: I never played the original and I've only clocked five or six hours on the DS remake. So far, it's been underwhelming for me. A lot of people claim it's the best of the NES Final Fantasies, but the job system is just way too simplistic for my liking. Could move up or down when I finish. Thirteenth one played.
Final Fantasy IV: This is the first "overrated Final Fantasy" to me. The storyline was incredibly underwhelming and I disliked pretty much every character. It wasn't a bad game, merely okay. Fifth one played.
Final Fantasy V: This one gets "great" for the nearly perfected job system. This is the first Final Fantasy I played all the way through. The abilities and jobs really made this one. The story was decent, but I could never get enough of the gameplay. Also, Battle on the Big Bridge has to be one of my all time favorite video game tracks. First one played.
Final Fantasy VI: I think I've already clearly established this as my favorite. I just replayed it again on the GBA and it just never gets old. The battle system is a tad generic, but the job system wouldn't have worked with the heavy amount of characters. The story and music were all but perfect and those are what I really play an RPG for, as most of the time, the gameplay is interchangable. Second one played.
Final Fantasy VII: So overrated I can't even describe it. Everything about it reeks of manufactured and artificial sub-culture "cool." Everyone's an anime/manga stereotype and a boring and two-dimensional one at that. None of the characters compelled me, the story was convoluted and rushed. It was like playing a novel that was half done and then thrown at me out of nowhere. An ending might've been nice, too. The storyline from VI saved it from its generic gameplay, but not VII. It was all the same crap all over again. Fourth one played.
Final Fantasy VIII: I'll applaud them for trying a new route with the system after so many games of the same thing, but the Junction system fell pretty flat. The story was rather cool, but it started to feel like a bit of a rush job the further towards the climax it got. Third one played.
Final Fantasy IX: I really liked this one. Usually, overly simplistic games bore me, but it was a nice departure after the last two. It kept it easy enough to follow and was just rather fun. Plus, who can really hate Vivi? Seventh one played.
Final Fantasy X: The only upside to this game was John Dimaggio voice acting in it. Beyond that, I've never hated more characters in one game. Auron bored me in his generic "badass" archetype and every other character just pissed me off in one way or another. The ability to switch out in battle was a novel idea, but overall, the same boring battle system. Meh, no thanks. Eighth one played.
Final Fantasy XI: Ugh! I've played I think six different MMOs (Star Wars Galaxies, this, City of Heroes, Everquest II, WoW and LotR Online) and this was by far the worst (Though LotR Beta was close). I had high hopes for it, but it just bored me and never gripped me. The character creation was ugly and limited, the levelling was boring and straight-forward, the setting was generic. I might've been spoiled by pre-revamp Star Wars Galaxies (I LOVED the old system and still miss it), but it was just a bad game. Ninth one played.
Final Fantasy XII: Best one since VI, easily. I'm so glad they FINALLY shook up the battle system and hope they stick with it. It's the first one I've played where power-levelling didn't feel like a chore and I actually enjoyed going out and grinding (I filled up about 3/4 of everyone's License boards before I decided I should get around to beating it). I still need to go back and do all the sidequests (I only got about half of the Espers) when I get a new PS2, but overall, I loved it. The story was underrated. I think too many people were just upset by the fact it wasn't an epic save the universe type thing, so much as a political epic. Most of the characters were actually three dimensional and likeable and I loved most of the voice acting. Plus, Balthier. Just....Balthier. Twelfth one played.
Final Fantasy Tactics; The story was great, but the combat was just way too slowly paced for me. I can't get into Turn based strategy. Sixth one played.
I haven't played MQ or T-A and I only played like half an hour of X-2 before I wanted to vomit in my mouth and gave it back to my friend.