MW2 got overtaken by cheaters.  Never had a lag issue.

MW2 is pretty good right now.  Major flaw is danger close explosives turning games a bit silly.  Use FMJ if you can't get through a door it works pretty well.  Stopping power against cold blood is pretty even.  Painkiller doesn't last forever?

Camping is a superior playstyle.  Adapt to people pulling what 3-4-5 kdrs dropping moabs without thinking like whoa maybe I got some awesome handouts.  Where are all the adaptation videos of guys beasting and what are they doing.  Ego is the only thing keeping this game alive because people who are right will always take down those who are successful given enough time.

I have not seen a cheater in MW2.

Edit: It is impossible to understand what you are saying and you seem a little crazy.  Painkiller for a camper?  Getting through a door as a camper? 

You are confusing me.  In real life the only way to fight through an ambush is superior firepower.  That was removed in MW3 (in my opinion).  People take advantage of that but there really isn't anyone saying "hey don't do that" except on the boards which are mostly useless arguements that last forever then are forgotten.

Black ops was better than mw2 and better than mw3.

I agree that mw3 is exceptionally better then mw2. mw2 is hacked badly, this I have seen myself. Black Ops didn't seem to hold up the way I remembered it. As far as campers good or bad ... well you play your way and i'll play mine. Meaning accept everyones playstyle as what they want and you play the way you want. Seeing as how everyone has paid to play unless they are hacking all is far in love and wargames!