The sky is open to be branded, one of the things I have probably done the most of. Signage has this magical tangible feel to it when you see that vehicle you branded in traffic or you drive past the store you branded. Nothing is more thrilling than taking a brand from logo to shopfront to social media. I have been blessed with working on some really big branding projects, events branding vehicle branding, and billboards in my career. I cant pick a favorite category of design but the one you see the most and that touches you most when you drive by has to be signage.