all of it looks great ( far better than anything i can do yet) but for the tilting as he walks. instead of a tilt left and right the normal human body walk is a slite bouncing motion from the hips up. as steps forward the hips drop slightly and then raises to its full hight upwards as the leg is straight under the torso.

hips and shoulders also have a slite rotation with the swing of arms and legs.
as right leg goes out hips rotate countercloskwise, left leg out rotate hips clockwise. same motion with shoulders and arms.

( women that want to show off thier 'bottems and tops' exagerate this hip and shoulder rotation. look at russels sig pic. to get her 'front' to swing mroe she windmills her arms behind her making her shoulders swing more)

hehe sorry , studied art allot on my own when i was younger. Human motion was part of it to understand drawning people in motion.