CAMPING VERSION
Primary: ACR with thermal sights
Secondary: OMA
Equipment: Claymores
Special: Flash Grenade
Perk1: One man army Pro (OMA etc)
Perk2: Stopping Power Pro
Perk3: Commando Pro
Deathstreak: Final Stand
Kill streaks: predator missile, pavelow, AC130

FOOT SOLIDER VERSION
Primary: ACR with ACOG and Silencer
Secondary: Akimbo magnu
Equipment: Throwing knife
Special: Flash Grenade
Perk1: Bling Pro
Perk2: Stopping Power Pro
Perk3: Commando Pro
Deathstreak: Final Stand
Kill streaks: predator missile, pavelow, AC130

Oh well, I have 6 classes and I use them all (except 2 of them are the same with just two modifications).

Runner 1
Primary: UMP45 with red dot sight
Secondary: Magnum + tactical knife
Equipment: Semtex
Special: Flash Grenade
Perk1: Marathon PRO
Perk2: Lightweight PRO
Perk3: Commando PRO
Deathstreak: Martyrdom
Runner 2
More tactical version of Runner 1. Differences are:
Primary weapon: UMP45 with silencer
Perk3: Ninja PRO.

Sniper
Primary: Intervention with heartbeat sensor
Secondary: G18 Akimbo
Equipment: Claymores
Special: Smoke Grenade
Perk1: Sleight of Hand PRO
Perk2: Stopping Power PRO
Perk3: Commando PRO
Deathstreak: Final Stand

Assault class
Primary: ACR with red dot sight and grenade launcher
Secondary: Spas-12 with grip and fmj
Equipment: Semtex
Special: Stun Grenade
Perk1: Scavenger PRO
Perk2: Stopping Power PRO
Perk3: Commando PRO
Deathstreak: Final Stand

Lame class
Primary: F2000 with grenade launcher
Secondary: Thumper
Equipment: Semtex
Special: Stun Grenade
Perk1: Sleight of Hand PRO
Perk2: Danger Close PRO
Perk3: Commando PRO
Deathstreak: Martyrdom

For the killstreaks, I'm always going for harrier>chopper gunner>nuke. Sometimes I change it, sometimes.

I also have lmg+stinger class, but it's lame and not interesting xd
I usually go for smg class.
And after prestiging, I'm gonna change my classes I guess.