I would agree kn - after playing certain games in various genres, it's very, very difficult to go back to "inferior" games.
When I got my X360, I played X360 games exclusively for a few months. I finally went back to PS2 games, and they felt so unplayable because of graphics and gameplay.
Not only this, I fully blame Gears of War for ruining Lost Planet for me. LP was highly-touted by players as being such a cinematic showcase of greatness (tm). I found the game was so vastly mediocre compared to GOW that I really haven't gone back to FPS's except for fellow co-op'er EDF 2017.
Back from the dead, I'm afraid.