I'm gonna have to second saving anything you come across online that you think you could use later to Imgur. My collection is pretty big at this point. Most of the time I brows with the skeleton of an idea in my head of what kind of character I want to play and wait for an image to jump out at me, then use the details of that image to fill out the character. Sometimes one grips me so tightly I throw out the skeleton and make up something new on the spot, so I'd say the image is a very important part of the creation process for me.

If you're looking for something real life, but still out there, look up fashion show photos. They're incredible.