I don't know what it is, but the only big RPG series I never got started on from the 16 bit era was pretty much dragon quest. Everything else, been there done that just about.
Thats a shame man, Dragon Quest 5/6/9 on DS and DQ 8 on PS2 are quite excellent and are must plays.
DQ 4 on DS as well if you can look past the yokel speak and absence of the party chat which fleshed out the characters and helped direct you while on the world map.
THE BEST METHOD to run PSX games (and everything else for that matter) is via Retroarch - http://buildbot.libretro.com/nightly/
If you have any questions on how to set it up on Windows please feel free to ask, its very easy.