Well, I prefer kb+m. That said, I really liked the controls in kz2, even if the game itself wasn't very good.
I look at L4D/L4D2 which are the only FPSes I play regularly. I've briefly played the x360 version and watched videos of the x360 version online. The PC version is much, much better for numerous reasons but primarily controls. If you're using a gamepad in L4D2, you're also using autoaim, which brings me to my next point..
L4D2 is quite a bit harder than the first, so I'm honestly wondering if it's even possible to play some of the campaigns on Realism Expert on x360. It's hard as heck on PC, even for good players. Considering how important headshots are in that mode, it makes me think x360 players are at a huge disadvantage without mouse aiming. Wouldn't hunter pouncing be harder as well? Maybe some x360 L4D/L4D2 players who play expert here can let me know if this is true or not.
I've looked on youtube for videos of people clearing an expert realism campaign on x360 and can't find anything.
Demon's Souls Official Thread | Currently playing: Left 4 Dead 2, LittleBigPlanet 2, Magicka