what kind of games are you into?
The games I have are Kinect Adventures(obviously), Child of eden, Gunstringer, Fruit ninja, Dance central 1 + 2,
I can say that I enjoy those games. although id have to say that child of eden is not worth the hefty price tag it comes with when you buy it separatley. (I got it for 10 bucks)
The forza motorsport game looks kind cool, but if you dont like dancing/fitness games which there are a lot of on the kinect then there isn't much selection IMO.