ReZ loves the Disgaea series. Of course, he also loves Uncharted 2 as well as the Green Lantern movie, so it's hard to know if something's going to be good or bad just based on his recommendation.
It's a turn-based strategy RPG, so yeah, it's similar to Shining Force, Final Fantasy Tactics, Fire Emblem, Tactics Ogre, etcetera. What makes it stand out is the massive amounts of customization and the (largely optional, from what I understand) level grinding (level 1000 being the maximum in the first game), as well as a humorous story involving some really strange characters.
You'd probably enjoy it if you like strategy RPGs and don't mind long games that involve a lot of combat.