I will probably play Single Player for about 30 minutes just to get back into the COD mode, then play MP.

E. wait until i beat all the awesome games this year, then play it :)

" Put it in and be pleasantly suprised that I bought Brutal Legend instead. "

i will be getting home reading the manual real quick then playing multiplayer with my friend on ps3, maybe like an hour. i will get home from school and play single player and multiplayer.

Take off the shrink wrap and put it by my Xbox. Then, procrastinate a bit by posting on various portals that I bought Modern Warfare 2. Maybe make a post or two here. Possibly walk my dog. Then play the game on singleplayer.

Single player, or installing the game on my pc.

It will be later at night when I get it on launch, so I would probably jump right online and play some multiplayer first with my buds, since everyone is usually on later on..then the next day I would get into the Single player on Hardened or Veteran.

Despite my usual tendencies to play single player first, I'm thinking multiplayer just to level up and get some cool gadgets to tinker with before I devote myself to single player

I'll be wearing those damn NVGs in my car on the way home. It's a shame the roads aren't made for blackout driving... 
 
Aside from that. I will probably jump into and beat the single player campaign before i touch the multiplayer. The only reason for that is, I usually like the single player, but it has a finite amount of content to me. I have played so much CoD4 online that, since I started that game online, I haven't touched the campaign since. (save when I haven't had connection to xbox LIVE)

Single player for a little bit and then straight to multiplayer.  I assume that we are going to have Bombing Runs for this, no?

Single player, unless somehow all of my friends that play games get an Xbox 360, Xbox Live, and MW2 by then and get it the same day.

Confine myself into my room for several weeks, playing through the single player on all difficulties and playing non-stop on multiplayer.

singleplayer for sure.

Jump onto Spec Ops me thinks

I am going to flip the fuck out

Multiplayer. I'll do singleplayer when I have no friends online.

"Multiplayer. I'll do singleplayer when I have no friends online. "

Install it?!

E: wont bother getting it in the first place lol.

E. single player then some mutliplayer right after and never return to singleplayer again 

I'm gonna play the entire single player before hopping online.  I need to get myself back into the flow of things.

would have loved to put on NVG but the fuck holes refused to sell them with the PC version.

invert controls and put sensitivity to HIGH

yeah i dunno man. i might do single player immediate but chances are i will go multiplayer first. 

E: Make an edgy as hell comment about how I'm not going to buy the game lololololl
 
In reality A I will play the single player until I die or come to a point where I feel like stopping and then hop online to check out whats changed, what hasn't etc.

Install it to my Xbox hard drive, and then probably play the single player until one of my friends gets the game.

Single player. Im more of a single player person than i am multiplayer.

Finish SP, then move on to the awesome MP (I hope.)

Straight to single player. If I buy it that is. Stupid money, need more of it.

" Saving it to my hard-drive while D. Try on my night vision goggles  "

A or E. If it is E it will be because I am playing something else already that I want to finish before.

Single player. Always finish that before jumping int multiplayer.

E: Take the dog outside so that for the next 8 to 10 hours I can play with no interruption. Then I'll hook up IV, so I don't have to get up for drink or food :D. Maybe first I'll play through couple of sp missions, but after that when my friend list is full of "Currently Playing: Modern Warfare 2", maybe then I'll go online, so that I can find out that the damn multiplayer isn't working...

straight to the mp, so I can pull off some 1337 headshots and pwn all the noobs.

Read the manual.  So I don't keep looking for the X, O, Triangle and square buttons!

Straight to single player.

E: Setup my 250GB Xbox ;)

Eat it.

" I always read the manual, usually in the car before heading home. "

Play Call of Duty: Classic.