The main thing to remember is that microstock is stock photography, it's not a place for the 'art of photography'. While artistic images might be accepted and sell in limited quantity these are probably not the best way to go if you want to make some good earnings. Likewise photos that a lot of people praise either by word of mouth do not necessarily make good microstock pictures; these often look pretty or have a wow factor, but usually lack a meaning or concept, this is a common mistake for most beginning photographers dipping their toe into the stock industry.From my experience and that of a few other industry commentators I have read, microstock is a place for 'clean and simple" 'middle of the road' photos. Portrait Photography, Tabletop Photography, Landscapes, Travel, Fine Art Photography, these are some kind of images which sell best.