Please post a list of the best and the must haves.

Parasite Eve
Xenogears
SaGa Frontier
SaGa Frontier 2
Breath of Fire III
Breath of Fire IV
Vandal Hearts
Vandal Hearts II
Arc the Lad
Vagrant Story
Tales of Destiny
Tales of Destiny II
Suikoden
Suikoden II
Final Fantasy V
Final Fantasy VI
Final Fantasy VII
Final Fantasy VIII
Brave Fencher Mushashi
Chrono Cross
Chrono Trigger

Chrono Cross
Legend of Mana
Grandia
Tales of Destiny
Tales of Destiny II (aka Takes of Eternia)
Tales of Phantasia (PSX remake)
Valkyrie Profile
Breath of Fire III
Breath of Fire IV
Final Fantasy Origins + VII, VIII, IX
Persona: Revelations
Persona 2: Eternal Punishment
SaGa Frontier
SaGa Frontier 2
Wild ARMs
Wild ARMs 2 (2nd Ignition)
Star Ocean: The Second Story
Suikoden
Suikoden II
Threads of Fate (aka Dew Prism)
Vagrant Story
Xenogears
Rhapsody: A Musical Adventure
Lunar: Silver Star Story Complete
Lunar 2: Eternal Blue Complete
Thousand Arms
Legend of Dragoon
Legend of Legaia
Arc The Lad I, II, III

If you like tactical RPGs, then

Saiyuki: Joyrney West
Eternal Eyes
Hoshigami: Ruining Blue Earth
Front Mission 3
Final Fantasy Tactics
Tactics Ogre
Vandal Hearts II

Arc the Lad Part 1-3

FYI Arc the Lad 1-3 are considered to be TACTICAL RPG's...

devia and agozer posted everything worth playing besides arc the lad

90% of those lists are basically the same game with different spiky haired protagonists. Parasite eve is rad though