istockphoto lists their over-submitted subjects:
- Your dog or cat
- Flowers
- Flags
- Feet
- Immediate environment – computer equipment
- Light blurs
- Brick Walls
- Fire
- Eyes
- Symbols
- Sunsets and clouds
- Forests
- Airplane wings
- Your shadow
- Backgrounds
MYRMECOS
Little Things Matter
Surprising that feet would be on the list — ick (though not mine, of course!).