Physically Based Animations -

• All about physics.
• Assign masses to our objects, establish initial and reaction forces, then run simulations.
• Results look real
• Lack of control

Hand Tweaked Motions -

• Establish the positions and orientations of objects at "key" time steps
• Interpolate the positions of objects in-between
• Very good control
• Making it "look" real is an art, and sometimes we don't want things to look real

Motion Capture -

• Can capture style and nuance
• Looks real
• Good Control
• Hard to edit