I may be converted

I was thinking about my figurative GOY vote again today and I think that right now I would throw my vote to CoD4.  I previously posted that I was leaning toward BioShock as my choice, but, as amazing as that game is, its lack of MP hurts it in a comparison with a game that has an amazing MP, like CoD4.  My GOY from last year was GoW (and would be again if I could do so) and one of the main reasons was because I was (and still am) playing it long after its release.  Replayability should definitely factor into GOY.  I played through BioShock and quickly traded it in while I could still maximize its value.  I won't be trading in CoD4 because I can see myself still playing this a year from now.  While I would give the nod to BioShock if I were comparing only the SP portions of the games, it isn't like CoD4's SP was lame.  It is short, but it is truly amazing graphically and it plays relatively bug-free.  A lot of critics have said that it can't win because the campaign is so short, but the campaign on vet difficulty is going to wind up taking more time for me to complete than BioShock did.  So, right now, I have decided that CoD4 has supplanted BioShock as GOY in my mind.

However, I have to qualify my vote by noting that I haven't played Assassin's Creed or Mass Effect yet.  Gamefly has sent me Mass Effect and Assassin's Creed is at the top of my Que.  However, since neither of these games has MP, they will have to be so amazing and so likely to hold my interest for an extended period that I will feel compelled to click the "Keep It" tab before I could seriously consider either.

Has CoD4 caused any of you to rethink your GOY votes?