Well basically the best titles have allready been mentioned.
RPG's
- Shim Megami Tensei series (Lucifer's Call, Digital Devil Saga 1&2, Devil Summoner and Persona 3); Strange RPG's and hard to get into, but definitely worth buying.
- Dark Chronicle; really appreciated by RPG fans (I never got a chance to buy this one :( ) In US it's called Dark Cloud 2
- Kingdom Hearts 1&2: Disney meets Final Fantasy; real classics! Don't play if you dislike FF ofcourse.
- Suikoden 5; best Suikoden of PS2 generation
- Star Ocean 3; great combatstyle / seeing enemies on world map, so you can walk passed them
- Dragon Quest VIII: great visuals and great replayvalue
- Shadow Hearts: Covenant; interesting battlesystem and for once in modern times not classic or fantasy stuff.
- Rogue Galaxy; Realtime fighting, interesting story
-Worth mentioning Arc: Twilight of the Spirits (Not a JRPG, but with a great story) battlesystem was kinda dispappionting though, Shadow Hearts: From the New World (haven't played yet), Valkyrie Profile: I won it, but lack of time prevents me to actually play it.
- Never released in EU, but worth mentioning: Radiata Stories, Tales of the Abyss/Legendia, KH: Final Mix, Xenosaga series (Part 2 got released but bombed...)
Tactical RPG's; ain't getting more JP than this tbh. :P
- Disgaea 1 + 2; really awesome, great humor, basically the best you can get in this genre
Worth Mentioning: Phantom Brave & La Pucelle Tactics (Haven't really played these too yet)
The Patapon forumtopic: http://www.vgchartz.com/forum/thread.php?id=14103
