Hey, did you even look at either of the photos in this post? If not, congratulations: you're normal. Eyetracking maps show there is a certain type of image that people literally do not see on a web page. It is amazing to realise that images can be totally ignored by a sample of 30 people in the entire time they spend looking at a page. A selective blindness strikes virtually all viewers.
Perfection gets rejection. It isn't repulsive photos that repel the eye's photos of professional models posing. They all look the same.
At Usability Week 2006 in Sydney, Kara Pernice Coyne showed numerous examples of this phenomenon. All were based on her own research with Jakob Nielsen.
Want a visual filler for your page about office equipment? Don't even think about using a stock photo of a model smiling. Out of the corner of their eyes, readers notice just enough to deduce: boring, fake, might be an ad: avoid!
Instead, use an image of a real person in a real situation. Images that do get attention are relevant to the content, clear, and just the right size. We look at images of approachable people, smiling and looking at the camera.
YouTube is built upon such truths.