Honestly, if you're a traditional RPG fan, you probably want to be looking at the DS instead. You've got a ton of well-done remakes of classics like the Dragon Quests and Final Fantasy games, plus new games like The World Ends With You, ASH, and new entries to the Namco Tales series. Bioware's got a game forthcoming, too. (Most importantly for me, though, there's a Suikoden game headed to the DS.)
Plus, chances are that you missed out on a lot of the great GBA RPGs, like Golden Sun, Riviera, and Fire Emblem.