If you could have any artistic ability (that you don’t already possess), which would you want?

Drawing and painting. I watched a caricature artist sell drawings at a local Medieval Fair for $15 each and that was about 40 years ago. He could sketch one out in about 10 minutes and had people waiting in line to get theirs done. He was making damn good cash money and only had to supply pads of art paper and sketching pencils.