Macro photography is usually associated with images of bugs and flowers, but even subjects like snowflakes or water droplets in the studio can make for amazing macro photos. I think macro photography is the one of the easiest type of photography and street is the hardest. A really good street shot is rarity.
What Sells Best On Shutterstock?
Some types of photos that sell best are Portrait Photography, Food Photography, Landscapes (usually with people) and fine art photography (artsy).