Hm... I tend to use the "rolling eyes" smiley only when referring to myself or something in my life that I am frustrated with, but can see the humor in. It is much like the "oh, not again!" sort of idea. I don't use it toward other people's posts, because I do not feel that way about other people, anyway.
I also used to roll my eyes when I was younger, though I'm not sure why. My parents always got angry at me for it, so I stopped.