Bad Company 2 SP first impressions:

It's a lot better than the first one. Cool start but a bit supernatural.
Far too many cut-scenes in the first level and too much messy variety in them. There's first-person cut-scenes where you can jiggle the camera, first-person cut-scenes where you can't jiggle the camera, in-game first-person cut-scenes where you can turn around but the other controls are locked (and it has those fucking ridiculous widescreen movie black bars that appear for no reason like in The Bourne Conspiracy), Modern Warfare rip-off satellite loading cut-scenes, third-person cut-scenes where you can jiggle the camera and third-person cut-scenes where you can't. I'm sure I've missed a few out but you get the jist.
To put it bluntly, why the fuck do we need any cut-scenes. Modern Warfare gets by perfectly without any.
Another thing MW does better is the death screen. You die, up comes a a poignant war-related quote (or the fucking annoying "you were killed by a grenade/dog/lawnmower"... I know) then you're back in the action. In BC2 you die. You go to the death menu. You select retry. You wait five seconds for the level to load, presumably because the console has forgotten about it while waiting for you to fuck about with the menu. Then you're finally back in the action.
I'm playing on hard so I die fairly often and going through that every time really breaks the flow of play.
Another annoying thing is when you pause the game there's this repetitive distant banging sound, like someone dropping a brick on an empty oil drum outside your window in perfectly slow rhythm, so if you pause for quite a while to, say, write a pointless blog post that no-one will ever read you have to mute your TV. This is annoying. Why put such a fucking stupid soundtrack in a game?
The shotgun's good.