One of my favourite things about creating public art is fitting the art to the space it's in. It was fun to paint a weight lifting octopus in a fitness club, or bees playing hockey near a city's new hockey arena. It gives me an extra element to play with and helps generate ideas that I otherwise wouldn't have had.
Painting on walls is something I've been doing since I was 14 - my bedroom in highschool was one big mural. I find murals are the best opportunity to collaborate with other artists, because there's so much space. I'd love to work with more 3D spaces.