My two gripes with his animation would be:
a) the double jump, but then I've never really liked this mechanic in general
b) his walking animation - which is basically his running animation... but slower (although I guess you could argue Kratos simply doesn't do gentle strolls)
Overall the animation in GoW and GoW3 in particular is great - but those two aspects of Kratos have always been a little "off" in my view.
So I agree.
Try to be reasonable... its easier than you think...