Yay! Nice to see you animate again.
Here are my musings on this animation.
I'd like to point out first off that the key poses are basically correct, and there's nothing 'wrong' besides what I explain in the picture below.
Only thing it really... lacks, is style. It looks plain and lifeless; maybe it's the way the head is positioned and not bouncing in its own rhythm instead of precisely following the body (you make slants in the head as you draw the first inbs).
Maybe it's the timing, most of all. I don't see a pick up of pace or a slow-down at any point.
On the other hand, the above ideas are all fine for now, because they're things you repeat and practice on.
BUT... there's no excuse for this one