I'm not that good a player, so I usually stick with UAV and Predator being two of my killstreaks. It's the 4-kill one that I'm not entirely sure about.
 
I've been using the care package for a while now, but I'm interested to learn more about how effective the counter-UAV is based on other people's experiences. Do you rely on the mini-map a lot? How disadvantageous is it to not have a working mini-map, and how much does it benefit my team if the enemies are 'blind'?

counter UAV suuuucks.  Well maybe not that much, but half the care packages you get are counter UAV's anyway so I would say just go with care package.

Care Package all the way. Although you have a chance of getting something crappy, I've gotten a ton of AC130s and Chopper Gunners from Care Packages.

If your going to go the care package route, be sure to equip Tactical Insertion.

no matter what, i always have the care package kill streak on. it's my favorite (next to emergency airdrop) and it's surprising at times. 

" Care Package all the way. Although you have a chance of getting something crappy, I've gotten a ton of AC130s and Chopper Gunners from Care Packages. "

" @StarFoxA said:

" Care Package all the way. Although you have a chance of getting something crappy, I've gotten a ton of AC130s and Chopper Gunners from Care Packages. "

An AC130 in a care package is the sweetest crime of all. "

I remember my first care package.  It killed me because I am an idiot who decided to stand in the red smoke.
You should put care package and then sentry gun so you can throw two red smoke.

Counter-UAV is great if you like winning. Care Package is great if you like getting kills. 
I find that when I roll UAV, Counter-UAV and something else like harrier or pavelow, my team wins more often because we constantly have uav up and the other team is blind

I thought about Counter-UAV myself for a bit. I'm a little reluctant to use it because I'm not sure how dependent other players are on the map. I suppose the best use of it would be in games like Domination and Capture the Flag where location coordination is important. But I go with the Care Package because I'm not really that great at this game but love playing it. Sometimes you can do crazy stuff with a Care Package. I double stacked Attack Helicopters one game. First I got one from a Care Package and then I got one with enough kills and it was pretty awesome. Or like other posters have said, you get an AC-130, Chopper Gunner, or Stealth Bomber early in the match and do some damage. I've only gotten EMP once but it was a lifesaver. 
 
If you use Hardline you could play a pretty mean support role in some games. Quickly get a UAV, a Counter-UAV, and then Predator Missile no one can see coming.

if you're a selfish player, skip counter UAV and roll Silencer+ninja.

i find i use the map on my screen to see where my team-mates are and get really annoyed when someone uses counter uav. 
but i would still chose the care package because of the awesome stuff you can get

I hardly use either, care packages aren't guaranteed to be any good and they take you out of the action, leave you vulnerable when collecting. Any kills you get from resultant killstreak rewards don't count toward your killstreak. As for Counter UAV, if I'm not using Cold Blooded then I'm probably using Stopping Power and I can shoot them down pretty easily. 
 
Better off starting with Predator, then an air unit, then AC-130 / Chopper Gunner.

Counter UAV is great! Save it up for when the op uses a UAV.
 
*Enemy UAV spotted!*
"Enjoy your static bitches!"
*Counter-UAV is up, they're blind!*

MODERN WARFARE 2 TACTICS

COUNTER UAV

• Blocking out UAVs-the obvious one, and the easiest to do. In specific game modes, like Team Deathmatch and Domination, UAVs are priceless-especially in Domination, as most people use much stronger killstreaks but son't know where you are.
• Prevention of mass murder by airstrike-This is a bit more difficult and a lot of guesswork should be done to this. Using a Counter-UAV means that your opponent's airstrikes will be in a fairly random area, normally in the centre of the map. The best way to do this is by either keeping a track of how many kills your opponents have (easier to do in Search and Destroy), or by using your killcam as an effective way to see the opponents killstreaks
• Infiltration-In some games, like Sabotage, you will be able to figure out or know where your opponents spawn place is. By using a Counter-UAV, the opponent won't know you have infiltrated their base until you have got a fair few kills.

i would go with care package depending on what game u are playing. a lot of times i get UAV and counter-UAV a lot. there are times where i call in UAV, get the care package to get another UAV. i would only use counter UAV when i'm playing something that needs tactical things.

 cool

a lot of times i put out a care package and its ammo so i decide to leave it there to attract the other team while im in a good spot with a sniper.  But my team will 99% of the time see me throw out the smoke grenade and try to get the package even if i want it or think that i died and dismantle my trap

Personally I like running uav Cuav and predator. My biggest beef with care packages is having to wait like a sitting duck.

Care package means the possibility of an AC-130 after only four kills. Debate ended.