DS game suggestions?

[wordsfailme]

So, I finally sold the dozens of games I had stockpiled over the course of the past 2 years. It got me thinking: "I really need something new."

So, now I'd like any suggestions as to what kind of games you enjoy, and would recommend.

Some examples of games that I sold:

-Elite Beat Agents
-Super Monkey Ball DS
-The Legend of Zelda: Phantom Hourglass
-Animal Crossing: Wild World
-Tetris DS
-Final Fastasy IV
-NEW Super Mario Bros.
-Trauma Center 2: Under the Knife
-Super Mario 64 DS

+ a bunch of others.

I enjoy the strategy and simulation-type games, as well as classic arcade games.

Any ideas?