Now that I think more on it to be honest and more realistic, I wish they would put Final Fantasy 13 up there. I had it once and gave it away because I hated it. But... it's Final Fantasy and I really love that series. 13 was the only one I gave no chance, I hate the main character. But I would buy it again off GoD, because I treat that as my personal "Must play no matter how I feel about it" bin.
It is my opinion that Halo is the best thing to hit gaming since the creation of games itself.