I think a major problem is the anticipation. The character goes into a pose that screams anticipation to me, but it stays there very long and then jumps straight from there instead of having another moment of more extreme anticipation. Have him go into the anticipation fast (maybe with 1 very extreme pose before the direction change to give it some oomph, just one frame, like the equivalent of a smear in 2D) and snap out of it again very quickly, really make it strong, because jumping over a box like that takes a bit of effort. The landing also seems very light and there's little followthrough on the arms/head. Maybe have him take another step or sway a bit to catch the momentum of his landing. After the anticipation the torso seems so remain more or less in the same position throughout, that feels kind of stiff. Play around with that a bit more.
I've only been studying for a semester myself, so someone more experienced could probably be even more helpful, but this is what I think of it so far
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Rotor - GoGoJoJo
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Thats great advice, hes on point, the anticipation;
try setting up a similar physical situation and jump the same height yourself and see how your body reacts to those heights times and weights. '
The arm swinging in the first part is good it shows a looseness the character is preparing to explode but then just goes stiff before the jump. You want to keep that flow that the arms have going in through the jump.
Its 10 times better, nice work,
it appears that the way he is in the air and landing would be more suited to a character already in the motion of running,
being stationary, the motion would seem more realistic if he didnt travel so far, maybe just jumping onto the block instead of over it landing on both feet rather than one at a time which indicates the character was already in a running cycle.
really nice- main problem is- you have too many keyframes on his way to land= it makes him float in the air- try practicing bouncing balls- everything that is affected by gravity will act like a jumping ball.
you need to spread apart the keyframes of the bottom of the jumping arc and bring it closer to the middle up (you can also delete some if it makes him hand in the air too much)
and also i think his hands should go up a little bit before he jumps- to give him the momentum to jump from their movement- try watching people jump- or record youself on video jumping over such obstacle- and measure the time it takes you. :]