I will also jump into the FF rankings, since I kind of got us started down this road.
My personal favorite has always been 2e/4j. Classic kind of story and "feel" to it, with lots of characters legit dying and what not. Some of the remakes have unfortunately undone some of that, but it was a pretty intense storyline and a hard game for me at age 10ish to 13ish when it came out.
From there, I consider 7 and 6j/3e equivalent for different reasons. I actually liked the plot and characters in 7 more than everyone else seems to now; I think people calling it crap now are overreacting violently to the others who want to give it oral before bed every night. On the other end of that spectrum, I think that people give too much credit to 6 - The first half of the game sets it up to be the best of the series by far, but I found the unfocused second half to be a downfall as opposed to a virtue.
8 would be next for me. Really, really flawed gameplay; I hated the draw system. But the plot is super-mushy and effective to me. I think this is the only FF game that gets the "falling in love" kind of plot done effectively.
Conversely, I disliked most of the characters in 10 - Lulu and Rikku and Auron were cool, everyone else should have fallen off a cliff. I thought the gameplay system was fun though, once I got the hang of it. This was the first FF game (at least to me) that had an obscene amount of things to do at the end, with the mugging and sphere grid maxing, that I actually wanted to do.
I'm not really sure where to put 5 or 12, so put them in a tie here. Both were kind of "blah" to me, but still playable. 12 was quite excellent for a bit, story-wise, but the ending and story arc just seems to resolve out of nowhere, and at times it feels like you're a droid in Star Wars - You're (Vaan, Pinehro) watching the interesting characters (Ashe, the thief, Fran) go through their journey and you're just tagging along. 5's plot feel amateurish and lackluster sandwiched between 4 and 6.
2 and 3 I never got into because of their format at the time I discovered them. By the time I played translated versions, I had blown through 7 and 8, IIRC. 3 is better than 2, which is ridiculously broken.
I put 1 down this low because I don't find it that fun to play anymore. One of the remakes that adds in dashing and more generous gold amounts? Sure - Those versions are above 2 and 3 on my list. But the actual old NES cart game has not held up well at all. The "challenge" is derived from illogicals and programming shortcomings. I can carry 99 potions but only 4 of each weapon? It takes 5 minutes to buy tons of potions? A piece of armor is 30k gold, and I get 800 (at most) per battle from giants? I can hit thin air with my sword? Just a miserable, miserable slog in PRESENT TIME, when there are tons of better options; the SNES games still hold up, whereas FF1 does not to me.
And, unless I'm missing a game, 9 is my least favorite. Horrible plot, horrible lead character, needless and foreseeable plot twists, and a fake "retro" sheen.