FFX is probably the easiest to get into, and it tells a really surprising story. In fact, I'd say it's one of the most original (not necessarily best) plots in the whole series. The characters are complex, the voice acting is generally good, and the setting is creative. All those points ALMOST manage to counter the absolute shittiness of characters like Tidus and Seymour. I'm playing XII for the first time now, and I actually quite like the characters that aren't named Vaan or Penelo (or maybe I just like how much of a medieval fantasy pimp Balthier is). It's harder to get into though because of its mechanics, and plays more like an MMO style RPG than a traditional one.
I'm not even going to get in to why VI and VII are excellent. Both have lackluster gameplay and dated graphics, but some of the best stories and characters you're going to find in a game.
IX is a personal favorite of mine, but it's built kind of like an homage to past Final Fantasy games, so you might want to play that one later if you liked the others.
And the best of all, and I mean by FAR the best of all is Final Fantasy Tactics. The original has some pretty bad translations, but there are patches out there that fix it, and Final Fantasy Tactics: War of the Lions on PSP is a remake the fixes the translations and adds some new stuff. It's an SRPG like Tactics Ogre, Advance Wars or X-Com, so it's fundamentally different than others in the series. Easily has the most unique and varied gameplay in the series, with my favorite class system of any RPG. It also has well-written characters that are a bit more down to earth and relateable than what you usually get in a JRPG.
Skip XIII. It's about pretty people running down pretty corridors in a completely nonsensical world.
I'm not even going to get in to why VI and VII are excellent. Both have lackluster gameplay and dated graphics, but some of the best stories and characters you're going to find in a game.
IX is a personal favorite of mine, but it's built kind of like an homage to past Final Fantasy games, so you might want to play that one later if you liked the others.
And the best of all, and I mean by FAR the best of all is Final Fantasy Tactics. The original has some pretty bad translations, but there are patches out there that fix it, and Final Fantasy Tactics: War of the Lions on PSP is a remake the fixes the translations and adds some new stuff. It's an SRPG like Tactics Ogre, Advance Wars or X-Com, so it's fundamentally different than others in the series. Easily has the most unique and varied gameplay in the series, with my favorite class system of any RPG. It also has well-written characters that are a bit more down to earth and relateable than what you usually get in a JRPG.
Skip XIII. It's about pretty people running down pretty corridors in a completely nonsensical world.