Please no more Kratos. He was a great character, with a proper arc, and he was the star of a great story. GOW I was a proper Greek Tragedy in fact (whether Jaffe intended it or not).
Then came GOWII, continued a story that didn't call for a sequel, and in a way which can only be described as convoluted drivel on the level of your average teenage fan-fic. It also turned Kratos into a shallow parody of himself in the process.
GOWIII only made it worse. Kratos was basically a despicable, sadistic, blood-thirsty version of the Hulk at that point, only without Bruce Banner to balance things out a bit.
GOWIII, even though I enjoyed the gameplay and the visual design, was one of the few, or rather the only game I've ever played which made me feel uncomfortable and downright filthy at regular intervals.