Slightly inspired by another thread :P Thought I'd see which of the final fantasy games are the most popular on this forum (FFX-2 and FFXI dont count for clarity).

I've only played FF3, FF4, FF7, FF8, FF9, FF10 and FF12

1) FF10 - This might not prove the most popular choice, but for me FFX had the most compelling, yet contained story of the series. The fact that tidus is new to the world of spira is a clever device which allows the game to go into detail about the game world without seeming excessive. I also think that the music (bar the main battle theme), is the best in the series. The sphere grid is also my favourite character progression system.

2) FF12 - By contrast this probably has the worst story and music, but I just had such a blast with it. The RPG aspect is so incredibly deep with so many layers of customisation, and the esper battles  are alot of fun. I also like the fact that its LONG.

3) FF7 - This game has an amazing atmosphere, and a great story, I actually dont like the RPG element of it as much as other FF games, as your party members end up being pretty much carbon copies of eachother by the end. Awesome music though

4) FF9 - Decent, though not amazing story. I liked the fact that characters were given specific classes, but I also felt like there wasnt much room for customisation in character progression.

5)FF4 - I actually quite liked the story, though the final act felt a little forced. I liked the fact that it was a difficult game, and that you really had to be on the ball to win in most boss battles.

5) FF8 - Would have been higher if it wasnt for drawing, and that  orphanage "twist", quite possibly the most bizzare plot device in the history of games. Also, its too easy to abuse the battle system with aura + renzokuken.

6) FF3

1.)FFIII
2.)FFVII
3.)FFIV
4.)FFX
5.)FFXII

NOt really a major fan of the series obviously.

I played all of them except 11. I would put them in this order

FF7
FF8
FF10
FF6
FF12
FF4
FF3
FF1
FF5
FF2

Ohh this is toughyy....

1. FFIX
2. FFVII
3. FFX
4. FFVIII
5. FFVI

1. FFX
1. FFX
1. FFX
1. FFX
1. FFX

1- Final Fantasy: Crystal Chronicles: My Life As A King

that's it

1. FFVII
2. FFVIII
3. FFX
4. FFIX
5. FFXII
6. FFIII

I also have 4, 5, and 6 which I haven't finished playing yet

I approve of this list.

1. FFVI -- My favorite game of all time so obviously my favorite FF.
2. FFIV -- Good game on the SNES and got better on the DS.
3. FFXI -- My favorite MMO, I love the job and crafting system.
4. FFIX -- Good game, probably going to replay it again.
5. FFVII -- The game itself isn't terrible but it's just so incredibly overrated.  We get it, you're in love with Cloud and you think Sephiroth is hawt.  That doesn't make it the most incredible game in history.
6. FFX -- It isn't' a bad game, but it's like your typical summer blockbuster: take away all the flashing lights and it's just meh.
7. FF -- It was a great game in its day but by todays standards it just isn't good.  I play it every now and then when bored but only for nostalgic purposes.
8. FFVIII -- Utterly forgettable story.
9. FFIII -- I only played this one on the DS but I just didn't like it.  I got maybe 1/3 way through it and just didn't want to continue because I just wasn't that interested in it.
10. FFXII -- Just a bad game.  The gameplay was a GREAT start but the way they implemented it, it just turned out so bad.  More importantly, the story was just so bland and the characters were so uninspired.  Easily the worst FF game of them all, I don't think the characters could be more uninteresting.

Note I didn't rank II and V because I haven't played enough of those to have any sort of opinion about them.

1 - FFX
2 - FFXII
3 - FFVI
4 - FFIV
5 - FFVII
6 - FFIX
7 - FFV
8 - FFVIII
9 - FFIII
10 - FFI & II