Why not: I want to get a bead on how other TG players play this game with the 360 version. PC players are welcome too I guess.

Standard - I change this up from time to time. But it's pretty consistent.
M4 with red dot
Perk 1: RPG x 2
Perk 2: Juggernaut
Perk 3: Extreme Conditioning.

This is my prefered "get the job done class" that I fall back on when I'm not doing too well. I can traverse the map with little trouble and take enough punishment to usually get to cover. The RPG let's me clear out strongholds, or down an enemy chopper. I use flashbangs for room clearing.

This is a "run and gun" class. I am constantly on the move and firing in short burst while moving. I prefer it on medium range maps.

Modified Standard - a new kit I've developed for unlocking the M16 perks.
M16 with nade launcher ("n00b t00b")
Perk 1: Claymore x2
Perk 2-3: Deep Impact
Perk 2-3: Stopping Power

With this class, I can be seriously effective at any range, but I prefer picking off medium to long range non-sniper classes with controlled 3-round bursts. If they're behind cover, I can still at least get some damage on them, possibly using the noob tube to finish them off. I generally try to find a building with a second floor and 1-2 entrances. I setup the claymores in semi-hidden locations at the entry points, then proceed to pick off OpFor players with impunity, using either a UAV or my teams comms for location.

It's basically a sniper class that can get you by when you've been found out or when you may need to engage OpFor when getting to a decent camp location. When the flow is right, I tend to dominate with this class.

Ninja - by far my favorite class, but is only effective in certain circumstances.

Primary: Silenced M4
Perk 1: Claymore x 2
Perk 2: UAV Jammer
Perk 3: Extreme Conditioning

Yea, the name is cliche', but who cares? You're generally off on your own with this one either flanking for kills or calling out OpFor locations when UAV isn't available. You won't last long against other more front-line classes, but you can get by in a pinch.

It's good to stay away from other teammates and flank. You need a good understanding of a map to run this class as running out in the open because you don't know good cover locations will get you killed fast.

This is my preferred "knife kill" class. Why? Not because it's fun (well... that's part of it). It's because people HATE getting knife killed. So, the OpFor will try to hunt you down for revenge knife kills. When this is happening, take full advantage. Run away and lead them right back to your teammates (make sure to let them know you're coming). Hilarity will ensue.

I try and dedicate myself to a certain task when running this kit. Kind of like the spy in TF2, you need to analyze how the game is doing and react accordingly. If one sniper is dominating your team, make it your mission to kill him. He'll be much less effective if he has to watch his back while also contending with the sniper rifle scope.

If they are grouped up and just cutting a path through your team: shoot one or two of them, then fade into cover. You don't always need to kill them, just distract them so your team can mop up. If you want to try for some kills, get a fix on their location then setup some claymores. Move up, pop a few rounds into a player, then fall back and wait for him to come to you. The claymores should do the rest.