I held a contest to make a new logo with a color palette and an idea about imagery. This artist participated and successfully abstracted my original idea into something I liked better. It is artistic, clean, and professional looking.
During the course of the contest, I asked for a couple of tweaks and the artist made them quickly.
During the handoff after selecting them as the winner, they provided all of the files in the variations I asked for. They were very polite and respectful and certainly wanted to make a great impression.