I've actually only bought 3 games this year and so top 5 is no good to me. Those 3 were GTA IV, Fable II and GoW 2.
I only have Gears left now. I enjoyed the others while playing them, but they weren't good enough to keep on the shelf. I have also played WaW and I love it, alot more than CoD 4. Quantum of Solace isnt a bad game, considering the movie. I( had a small play on Far Cry 2, and I thought it was awesome, and am looking forward to playing it over the holidays.