I own a DS with Castlevania: Dawn of Sorrow and Mario Kart DS... yes, those are the the only games I have so far
But it is a great console, and I need to get some more.
New Super Mario Bros. and Legend of Zelda: Phantom Hourglass will be next. And probably Metroid Prime: Hunters, but only because I'm a huge Metroid fan and want to brush up on the latest addition to the mythos(With all due respect, I want a sequel to the events of Metroid Fusion, the last game in the main chronological timeline... which will probably never happen now :/ )