More of the same thing yet it seems to work.
Presentation: Though playing Call of Duty for the campaign is like enjoy Uwe Boll movies for the story, Black Ops is like the Modern Warfare games in the respect that it has a good story that you actually want to follow. (Don't even get me started on how horrible Uwe Boll movies are)
Gameplay: It plays like every console Call of Duty game before it. There's literally no difference of gameplay from MW2 to Black Ops except for the ways the weapons handle.
Graphics: This graphics engine looks like it's about run its final course. While looking presentable and pretty, this engine shows its age and should have stopped being used after this game. Enough engine updates, try making a new engine.
Sound: One of the amazing parts of Call of Duty: Everything from soundtrack and voice acting to gunshots and explosions sound great.
Lasting Appeal: The multiplayer may no longer be in use by players except hackers because of Elite and MW3 being available. But there's trophies!