Now I'll get this out of the way first. I am not a fan of the Halo franchise. I have played every Halo game released with the exception of Halo Wars, and all I can say is that the repetitiveness of the games is annoying. Halo 2 and Halo 3 are basically Halo 1, just with more advanced graphics. All the levels are basically the same, as well as the enemies, and the weapons.
The ONLY reason I have given Halo Reach the privilege of being on my Top Ten list is because of one of the new features it introduced:
Custom Level Design.
I remember playing previous Halo games with my friends. After a couple hours of the campaign we'd get bored, then go onto multiplayer. Then after an hour or two of multiplayer we got bored and wished we had never played the game. However with Halo Reach, my friends and I were literally sitting there for over 12 hours, doing nothing but making our own levels and watching the random things we could pull off.
If you and your friends enjoy FPS console games, and want something new and fun to entertain you for hours, then pick up Halo Reach for Xbox 360 simply because the custom level design will leave you all in stitches for days to come!
Christmas in 3 days guys =D
-Adam