I have found that I don't like playing MW2 online unless I have a friend I can talk to or coordinate with in the game.  The reason is that I suck without someone on my team I can talk to.  My friends say the opposite,  They do well without me, where I can only do well with them.  So whenever we play together I do well and they suck.  Because of this I have been deemed an FPS Succubus.  Anybody else have any weird symptoms like this when it comes to games??