Depth of Field
Photos that use depth of field to focus on a particular subject in the shot.
Close Up
Photos that may be macro shots or using optical zoom.
Shutter Speed
Using shutter speed to blur or freeze action shots.
Lighting
Photos where the use of light is the main purpose.
Composition
Photos that highlight the subject or surroundings.
Nature
General photos of naturally occurring objects.
Man Made
General photos of objects made by people.
Nostalgic
Photos that bring back memories.