For the first you have a lot of floating animation where the doctor's arms drift from one pose to the next without holds or any sense of weight or conciousness of what his arms are doing. You've used primarily front and side views for your characters which aren't particularly interesting and static poses which aren't especially exciting. Additionally you have bright super saturated colours as background elements which detract from your foreground. Remember when animating digitally that all your classical concepts still apply.
For the classical piece you've used much more exciting poses with better angles on your character. About halfway through her bottom half melts into a wierd pose. Instead of having it simply morph from pose to pose there you could have her take a step towards the ball object.
Overall I'd say don't be afraid of slow-ins and outs, overshooting or having characters be mostly still. Work on your timing, acting and aim for giving believable weight to your characters. Have another look at your Richard Williams (if you don't have one go get one now, he's very helpful) if need be.
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