i had the whole weekend off and played from thursday night to saturday night with friends, managing to get to lvl 59. I still prefer MW2 because its pure fast arcade shooter fits my style, the memorable maps, and diverse choices of guns (hehe Akimbo Ranger). Pretty fun game, but i dont like the amount of pure campers out there. If you want to camp and sit in a position all day, why are you wasting your time in a casual game? COD is an arcade shooter. I will only give benefit of the doubt to campers in Search & Destroy, but nowhere else
anyways i personally love using the UMP+Range+Extended Mags in rush-friendly maps like dome, carbon, hardhat, and seatown (especially since i am a rusher). Nowhere is the ump as powerful as it was in mw2 or ak74u in blk ops, but range nets you the ability to kill consistent mid-range and semi long range (if skilled enough). Extended Mags allows you to use Extreme Conditioning for tier 1 perk instead of sleight of hand because the less need to reload due to extended clip. Tier 2: Assassin is almost a must with all those UAVs running around. Tier 3 is debatable, but I like that steady aim pro due to my rushing play style
Support imo has the best killstreaks (TDM at least). UAV+Advanced UAV+X is pretty godly in that it helps you net individual kills, but also acts as a team player. It is cool too that death doesnt restart killstreak and that killstreak resets after obtaining all your 3 killstreaks, making it possible to get two UAV+Advanced UAV+X(I use stealth bomber to at least give me Assault killstreak capabilities).