Best Base Perks to use
Since Base Perks are going to be what you start off with each match in Call of Duty: Modern Warfare 2, these are really important. Battle Hardened is definitely one Base Perk that appears to be a must use. Anytime that you can reduce the effects of the enemies’ Tactical Equipment, that is really important. Almost every player uses one of a Flash, Stun, Gas Grenades, Shock Sticks, and EMP. Not to mention that it also makes you immune to Snapshot Grenades. Battle Hardened definitely helps you out a lot and having it to start the game is really nice to have.
Another Base Perk that really is nice to have is E.O.D. This Perk significantly reduces explosive damage from non-killstreak explosives. Since you are using this at the beginning of each match, you shouldn’t have to worry about killstreak explosives to start. However, there is nothing worse than getting killed by a pesky random grenade that all can be avoided by having E.O.D. equipped.
I would also like to throw an honorable mention in for Tracker and Double Time as well. I have found that if you have the right class for these types of Perks, they can really help you do a lot of damage.