I have black DS Lite with Tetris DS, Brain Training, Mario Kart and now the DS Browser.

My favourite game is Tetris DS push mode, the game is made much more interesting by the fact that your opponent can use all the lines that you have carefully built up against you.

The Browser is pretty cool, it doesn't work very well with C9 because of the user bar, but for simple sites that are mainly text it works well enough.

Havn't played Mario Kart of Brain Training for a while, guess they wear off quicker.