Blackbird. Best plane in the real world, best Killstreak in all of COD. Dogs would be second best, which i will also miss.

And zombies as well.

Lets see:

Dolphine dive

objective leaderboards

dual mags

Ak47 old style

firing range

death machine

zombies

Blops style chopper gunner

hacking equipment/ enemy care packages

changing care packages

BTW guys, the blackbird is essentially in MW3, it's just balanced (still shows enemy positions and directions, but now shows like a UAV, I'd say thats balance)

nothing good riddence

I don't understand the advantage of an Advanced UAV over a UAV other than showing the direction of the player.

If I wanted to make the Advanced UAV useful, I would allow it to show players using Assassin on radar and show full movement of the players (like the Black Ops Blackbird).

This is one thing I'll miss in MW3 which has been incorparated in Black Ops, the Blackbird.

Saved my a** many times with those ghost players sitting in the corner.

Nothing actually...

Black Ops didn't feel like a CoD for me.