Hard to decide, maybe Phantasy Star Online, but that's more for the people than the game. I love all the Final Fantasy games I've played (7 to 12, excluding 11), Borderlands, Morrowind/Oblivion/Skyrim and the Fable series
I tried sending over your muffle but I couldn't even get type 3 to work in NV. I must wait until everything is easy mode again. So far NV is not as good as FO3. Shocker :P