Modern Warfare 2 is not nearly as good as the original Modern Warfare...

[Mummelmann]

I agree with the OP, single player is uninviting somehow, just doesn't feel the same at all. The story is... unoriginal to say the least but that's not a huge problem in FPS. Not every FPS should or can be Bioshock or Half-Life 2 after all but the gameplay seems unremarkable to me.