art mentioned the game in another thread. It, along with Dark Cloud 2 is one of my all time favourite games and certainly one of my favourite linear JRPGs.
Although the main story is very linear, both games give you a whole ton of stuff to pursue as you play. In Rogue Galaxy you are doing things from working to upgrade your weapons to training battle bugs Pokemon style. In Dark Cloud 2 you were taking photos, designing towns, fishing and every single dungeon could also be played as a golf course. Why ? Because why the hell not, that's why.
Level-5 (who produced both games) are simply awesome.