Halo:Reach, I expected to be a failure. However it was a complete surprise and I am VERY happy with it. It kept to the halo feel, and just improved it a bit by giving us a few new toys.
ForgeWorld is great, I spend so much of my time making maps. (Even if I havent figured out fully how to develop the maps for gametypes, they made it so awkward lol)
Xbox live gamertag: WelshAbyss
Feel free to add me and game to our hearts content :)