Were you totally lined up for a system on the first day? Did you wait until Christmas? Until Kirby? Or were you not drawn into the DS life until the Lite appeared? Whenever you got into the DS, we're glad you did, because we doubt you would be part of our community otherwise.
As for me, what finally sold me on the DS was Castlevania: Dawn of Sorrow. Luckily, the system got even more awesome after that!