I'll review each test individually:
Early walk test:
The animation was smooth, but you need to add a frame after the middle movement, so the minifig doesn't jerk down into the standing with the leg back position.
Pan and walk test:
Smooth animation again, but the same problem with the walk cycle.
Pan and zoom test:
Pretty good, but you need to ease into the camera movement.
More pan and zoom:
Definitely better.
Angled shot test and screaming]:
Nice.
Smooth head turn:
Also nice.
Dramatic pointing?]:
Great. 
Screaming?]
At first it was kind of choppy, but once he started flailing around more it looked better.
Early jump test:
Not bad.
Second early jump test:
Needed easing in/out.
Third early jump test:
The jump came too late after his arms went up.
Mood change test:
Not bad, but the face change was, of course, choppy. What I like to do is have it change out-of-shot, so it doesn't end up choppy. Also the foot going back jerked pretty badly.
Sitting and shaking head test:
Nice.
I'm not sure what's going on here:
Great! 
You're definitely off to a good start, keep it up! 