I'm a budding Halo fan myself, and I had played Halo 2, before I got a 360 and my mom placed a ban on Halo games. After we got Halo Wars (with a little coaxing), she's a little more open, and will let me play the multiplayer mode of Halo 3, once we get it offa the Marketplace.
BOT
I thought the game was awesome! I epically PWN'd a Normal difficulty 2-on-2 yesterday, and will try a 2-on-2 Heroic sometime.