Put it this way, I'll be pleased when I've beaten the final Legacy Boss...
...On the other hand, I can't wait to complete Erdrick's outfit this May (Armour + Gauntlets) and I'm 100% up-to-date with my Quests, which I enjoy very much. Every time I do one, I think to myself how much I like the game. It's so smooth, so perfect. The game engine, the villages, almost everything. I've played other DS games since, but nothing has a place in my heart like DQIX.