I mentioned it briefly in our PC-focused article last week but I think that the clarity afforded by the better graphics are definitely a factor in my play. I can spot enemies a lot better on PC whereas they looked washed out on console--even though I'm using the same 1080p monitor for both versions.
I tend to get pretty addicted to the multiplayer components of games as soon as they come out but stop playing them entirely a week or two post-launch: Halo Reach, Medal of Honor, and Modern Warfare 2 suffered the same fate when I got them.
We'll have to see if I return to the game this week. I wonder if playing it in 3D would change the experience?