I like to see credits because I will know who made the different elements. Who made the character, the props, etc? It's good if you want to get the items yourself. It does get tiresome to list all the credits. I'd actually thought of putting up a credits page on my web site. Show some of the stuff I use most frequently, then list the credits for each item in that scene. I very often post a series of images using the same characters, hair, scene etc. For instance I might be illustrating a set of Schlabber's poses because they are so dramatic and artistic. Then if I post a render of show something in my tutorial, I can refer people to my credits page.