legs on animated guy animate well enough, though I don't think the left sole would be moving left and right for a pelvic trust movement. Is the dude laughing? His one arm deforms at the elbow during the cycle.
The portrait suffers from faults explored in previous threads of yours: volumes need work, facial anatomy, definition. Neck isn't a pyramid, hair would best be organised as a volume first, and strands on its surface indicative of the flow.