Hi, I think you have good poses. Maybe you could add overlap (offset) to the spine and head, because they all bend at the same time which makes them feel rigid

left a few notes dude, Keep pushing

you've animated this nicely there's squash, stretch, and it has a nice pop to it
here is a few notes I think could help push it, even though its looking good so far.
1.lift up his left foot as they spread apart, the slide from one frame to another makes it appear unreal.
2. try adding a little more offset to the timing of things like the eyebrows and arms
3. try playing with the axis of things, like tilting his and body
4. maybe change the overall shapes of the limbs by twisting the wrists and changing the hand shapes and even having more variation on the feet.

hope these, help, if anything they are just my little opinions. awesome job