When writing an attribution for this user's Creative Commons work, include the name "Douglas Perkins", and if you're using the work online, a link to or URL of the Wikimedia page where the work is located.
This user often runs a Tor relay, but never a Tor exit node on the same IP as used for editing. He finds it particularly frustrating when relays are misidentified as exit nodes and thereby blocked. Since there's no way to easily notify Wikimedia Commons admins in such cases, he appreciates your assistance in avoiding such misclassifications and fixing them when they occasionally occur.
This user is an active contributor to Wikivoyage. If you find banner images that seem generally unwieldy in the upload list, it is probably because those banners are used in the header bar of Wikivoyage pages.