I jumped in early in 2006 (the store demo display of Fight Night was the game that baited me into buying the 360). Gears of War 1 was the first game on the system that made me completely forget about any thoughts of picking up a PS3 even though at the time I was a major PS fan (well over 50 games on my PS2). Most of the good games this generation are multiplatform. My favorite game this generation though has been Bioshock. Gears 1 & 2 are a close second. I didn't care for the Halo series last generation, I guess I just couldn't appreciate it as a PS fan, I went ahead and picked up Halo 3 and the franchise really is brilliant.
All the upcoming games above (MW 2, Ass Creed 2, ODST, Bioshock 2, Alan Wake, etc...) are on my list, but I didn't see any mention of Dante's Inferno or Castlevania.
