1 - I want to tell my daughter (still inside her mother's belly) about my life and life in general, and I want to do it with animation because I think it will stick to her mind much better than mere words.
The "piece" that I remember marking my childhood was Disney's Fantasia. The WHOLE movie matches the music... and what music!
2 - The one on the left is far superior. The other one lacks easing and smear when the ball is thrown up. Also, the piston on the left, as well as the movement of the ball it pushes lack a natural feeling; the ball seems to move linearly and the piston doesn't have the coil-like movement the one to the right has.
3 - My first animation ever; just a crazy line that likes to roll and jump... higher than it should.