The DS is a fantastic system. Just be willing to venture into different genres and unique games. for example, Pheonix Wright is probably the funnest game with a bad concept. Play as a lawyer? No thanks. The game itself? Awesome
Of course, CAGs will help you decide what games to buy, so dont worry aboput getting something you mightn't like.
P.S: Check out the new colours before you buy. They're Europe only, but you can still import