I don't play on a PC but if I had known that you could lean around corners on the PC versions of CoD I might have switched. I don't know if you've ever played a multiplayer game where you have this kind of control Joker but it is a big thing. It changes the whole dynamic of the game.
CoD on the consoles has always been a pure Run and Gun type game because it is an FPS and you can't really see how your avatar is positioned on the map, can't see around corners and can't lean. I came to CoD after being a hardcore SOCOM fan where while I wasn't a camper I wasn't a Run And Gunner either, I of course was forced to leave SOCOM because of the rampant cheating, hacking and glitching and CoD was the logical place to go. It was a fairly difficult transition, not just because CoD is A FPS and SOCOM is a 3rd person but because of the lack of leaning in CoD.