It seems that a DOP needs to learn to light for every situation and then tweak those according to script and specific locations. Though not exhuastive I have listed the situations in which one should practice lighting. Can you think of others that are good to practice?
DAY
Interiors room dramatic. Hard sunlight through windows with possibly a little fill.
Interiors room soft. Huge softbox outside window with a little fill inside room if necessary.
Interiors car and transports dramatic. Hard sunlight through windows with possibly a little fill.
Interiors car and transports soft. Huge so