I've used the same two photos of me as Facebook profile pics for like three years now. I like using different pics for my icon/profile pic in most places. Makes me feel more expressive.
Do you remember reruns of Let's Make a Deal where Door 1 had a brand new car and Door 2 had a trip to Hawaii and Door 3 had like a lifetime supply of beans?? It's kind of like that except I'd rather have the beans.