I paint German artists whom I admire. I paint their pictures, their work as painters, and their portraits too. But oddly enough, each of these portraits ends up as a picture of a woman with blonde hair. I myself have never been able to work out why this happens.
It's one of the most liberating things I experience in writing - letting yourself get rid of a gesture or character or plot point that always nagged, even if you couldn't admit to yourself that it did.