Love Golden Sun to death. Have both games.

I like how absolutely deep the battle system. That's the main thing that keeps me playing, really. The games really remind me of a mix of Shining Force and Beyond the Beyond (two other Camelot RPGs that I love the hell out of).

Oh, and Camelot said in a recent magazine (I think it may have been EGM) that they're considering making a third Golden Sun sometime. Gives us a small bit of hope as to seeing another GS game.