I think he's having trouble getting the reticule lined up with his opponent. He can't fine-aim it like he can with the delicate controls of a mouse. I understand his problem.
This. Even having being used to the Playstation controller (I've been using versions of it since the PS1), I'm completely unable to play first person shooters (or any games with similar aiming) on the console. Can't aim worth crap. Definitely need the accuracy of mouse+keyboard for those types of games.
(Which is kind of a shame - I've had to skip any number of supposedly interesting games because of it. Like the Killzones, the Resistance games, the Uncharteds..... ah, well.)
Pc controls are dumbed down with everything at the ready for you the correct tools for the job. I would suggest sticking with your keyboard and mouse and letting the Pro's poor svckers stuck using inaccurate thumbsticks use the controller.
