Its a good basic walk cycle, but,
If his attitute is supposed to be chilled it works, obviously an emotion can strongly effect a walk. Eg. and angry person may step up slowly but bring their foot down faster. You should think of an emotion and find the rythm for the walk. Someone told me to use musical beats to get this which works quite well.
Once you get the rythm of the walk then clean up the actions. Its no good having a walk unless it is conveying what you want. And as a character animator you would want to prove you can show emotions clearly.
I would agree with everyone elses comments you need a little more shoulder movement - usually opposite to the hips. Rotate the hips a fraction more, and get a bit more drag on the arms. (even if the arms look like they are broken it doesn’t matter you won’t notice it)
For a great reference on walk cycles I recommend you get The Animators Survival Kit by Richard Williams. It is fantastic for all types of animator.
Hope that helped.