I'd grant you FFVI, I'm also a huge fan of FFV.mardocOz said:I've not played IX, am playing X at the moment and it's OK...
But the correct answer to this is VI. By a million miles the best Final Fantasy game in existence.
Failing that give Chrono Trigger a go. One of the best JRPGs of all time. Secret of Mana is supposed to be good as well, although I never really got into it (turns out the SNES was a great platform for solid RPGs).
If you wanted something more recent, Ni No Kuni!!!!!
For the OP: If you really liked FFIV-VII, you will love FFIX. You'll feel less warm and fuzzies for it if FFVIII and FFX and later are more your preference.
Also, seconding Chrono Trigger as Square at the height of their ability.