Although I'm not a fan of CoD, I liked the BO2 one and the one before that. I despise graffiti so I obviously didn't like those but 3D wise on the middle one looks like it was used with the crappy 3D in CS5.
you need to work a lot on your 3D text the quality is really bad....
also that graffiti font that you use is overused and really bad. If you are planning on using graffiti try finding better one or make custom one .
also the BO2 background is pretty nice.