Regardless of the style of photography you engage in, a good image should trigger an emotional response. It could be wonder, intrigue, sadness, joy, calm, curiosity, or the myriad of other emotions that exist. As a landscape photographer I try to keep this in mind and present a final image that will attract and maintain the attention of anyone who sees it. One way of doing this is by including people in your shot. Adding the human element to one of your landscape images can draw the viewer in and tell a more complete story.
So why do I include myself and not someone else? The main reason, but certainly not the only one, is that most of the time, I'm the only person around. I am usually out shooting at odd times of the day and in locations that are very much off the beaten trail. As well, I can usually visualize the image before the shutter is released and know exactly what I'm looking for. Stepping into the frame can sometimes be easier than giving instructions to your model.
As an Olympus Visionary, this article references a number of Olympus products and uses screenshots from the Olympus E-M1 Mark II. The ideas behind the images however, can certainly apply to any brand of camera.