FF3. You will not be disappointed. Until you get to Medusa, that crazymother****ingpieceofshitfloating*****head Great stuff :)
Fighting talk perhaps, I gotta give 9 my support though, it's my favourite game of all time. 4 is second in FF terms for me, hence its inclusion. 5 is good wholesome fun, really abusable though with the blue magic, perhaps the most abusable game in the series.
I'm not a big Final Fantasy fan. 5,9, and sometimes 6 are the only ones I like aside from Tactics, but I just loved the job system in FF5 to death. 9 had the best story in my opinion. 4 never drew me in, it had sloppy storytelling and too many difficulty spikes to warrant grinding. I'll probably replay it someday and enjoy it.
I actually really enjoy 3. Sure the story's a bit meh, but I quite like the gameplay. 9 will always be my favorite though. c: