To my fellow dispatchers: What are some good metrics to reward drivers?

I’ve recently been put in charge of compiling a list of 3 drivers each week, and rewarding them for different things. I pick 3 drivers each week, and they get gift cards or swag if they are the top driver in a specific category. For instance, I might reward a driver for delivering the most amount of packages in a week, or for having the best POD metrics for the week.

My question to y’all is, what are some other metrics I can use? Things like DCR, most packages delivered, most positive customer feedbacks, highest POD successes, etc. I want to highlight all aspects of good performance/safety. Can y’all think of any metrics I can use? The more the better.