Yup darkness is good, i'm enjoying it loads at the mo, but its got good story and is quite slow-paced, i find i enjoy single player console fps more than multiplayer.
Killzone 2 will be a joy to play but when you start going to the multiplayer side of things if it's like pc multiplayer then you gotta have quicker reactions which i havent got with a controller, i'm much better with mouse and keyboard, so i leave all multiplayer fps to my pc.
Console fps multiplayer is way below par compared to pc fps multiplayer (although i could probably get usb keyboard and mouse but i'm leaving multiplayer fps to my pc) and its just down to the controllers, i'm happy playing single player fps on me ps3 and that's how it'll stay. (until i find out how good killzone multi will be then it'll be time to maybe get usb mouse n keyboard)