Lamentations of a Former Squaresoft Fan...
TL,DR: The series went to crap when they switched from 2D to 3D.
FF1: The one that started it all. The plot is a bit silly when you put even a little thought into it, but still you can't fault it for being the game that launched (to my knowledge, and I'm perfectly willing to be proven wrong) the longest running game franchise except for Mario.
FF2 and 3: Sadly I've never had a chance to play these two, I hear good things though.
FF4: It's really hard for me to choose between this, 6, and Tactics (the original on the PS) in terms of "what's my most favorite FF", but in the end I always settle on 4. The story is fantastic, the characters are all great, there's a number of parts that always end up being tear-jerker moments every time I play through the game, and the sound track is (in my opinion, of course) the best in the entire franchise. One of my favorite things about this game is the fact that you're not over-loaded with 10 interchangeable characters that - depending on how you equip them - can all function essentially the same (I'm looking at you in particular, FF8 >.>). Each character has their own unique uses and they come and go as the story progress. This keeps changing the party dynamic and requires coming up with different strategies as you progress through the story.
FF6: As mentioned before, this is one of my Top 3, though if I had to place it it'd come in 3rd. Remember how I said I didn't like how a lot of the games in this series overload you with too many characters to choose from? Well this game had a literal airship full of'em. So many characters that the final dungeon splits you into 3 parties of 4...and there's still a couple left out! That said I absolutely love each and every one of the characters in this game so it kinda balances out. Again, the story for this game is great, as is the sound track, and I will say this: Kefka = best FF villain. Ever. End of discussion.
FF7: I'm sure there's plenty out there who are willing to sing FF7's praises, and I generally agree with them. It was a really fun game, the story was a bit wonky, but it had decent characters. The combat and materia systems were really enjoyable too. I just don't think it's God's Gift to JRPGs that a lot of people out there seem to think it is. It's a good, solid game, and with the exception of Tactics, it was the beginning of the end for me with this franchise...as it's all downhill from here.
FFT: This one gets my silver medal. Hands down the
best story in the franchise - it's the story that made me want to become a creative writer - and that's why I always have such trouble deciding between this one and FF4. Ultimately though, while I
love the grid-based combat, the fact that each fight can easily take 20-30 minutes does become a bit of a slog. Still, I'm pretty sure that out of all the FF's, I've replayed this one the most. My favorite thing about the game is
not using any of the special hero characters you pick up along the way. Nope, I stick with my main character and the 6 cadets you start the game with. Why? Because you get to develop those no-name cadets into true heroes of their age. And when the monk you've raised since the beginning of the game executes that epic Hamedo counter with a one-two (two weapons) punch combo to the face, winning the fight and preventing one of your other characters from turning into a crystal...well, even those no-name cadets will go on to become legends. :3
FF8: And so we start the downward slide. My problems with this game stem mostly from the fact that, due to the junctioning system, it was too easy. With the right combination of junctions, you could literally have your characters enter god mode and use limit breaks every single turn. Beyond that the story is a ridiculous time-loop story, the characters are all unapologeticly emo about one thing or another, and over-all they started turning it more and more away from the actual fantasy settings that were the roots of the series and transformed it more and more into an anime-like story/art design. For a full list of complaints, watch Spoony's playthrough/review. This was the first Spoony playthrough/review I had ever watched and it instantly made me a huge fan. Why? Because quite literally every single thing he brings up is something that I've brought up at some point or another in discussing this game.
FF9: And speaking of cartoons, here's a game that I was so unbelievably bored with that I literally stopped playing it after I completed the first disc. I've heard people say this is the best in the series, they've told me that the first disc is slow but the game gets good after that. Well I'm with Yahtzee on the notion of "Oh the game gets great later on!" ........why can't it be great right now? Why should I have to complete 1/3rd of the game in order to start enjoying it? I'm not asking for a non-stop thrill ride from start to finish, but if you can't grab my interest by the end of the first disc then I'm sorry, it just wasn't meant to be.
FF10: Ehhhhhhhhhhrrrrrrrrmmmmmmmmmmmm no. No thank you. I will say I absolutely loved the combat in this game and I enjoyed Blitzball as a distraction as much as I enjoyed Chocobo Racing in FF7. Still, the main character is a horrendously unlikeable twat and...well, again, just go watch Spoony's playthrough/review of the game. I watched it long after I was done with the game and most of his criticisms are things I'd tend to agree with. Beyond that I hate how incredibly linear the game was. People give FF13 a bunch of crap by saying it's just one long hallway...well so was FF10. The difference is that there's actually, you know, stuff to do to distract you from the hallway in FF10.
P.S.: I'm pretty sure the infamous Laughing Scene gave me the mild tinnitus that I still have to this day. >.>
FF10-2: Rented this game...then took it back 3 hours later. That should tell you my thoughts on it.
And thus, with the abomination that was FF10-2, I finally washed my hands of the series and I haven't played a new FF since. From what I've heard, outside of a half-way decent MMO (along side a horrendously shitty MMO

) and Disidia (never played it but I want to just so I can be Kefka and murder/taunt everyone :3), I haven't really missed all that much.