Yeah well I guess there's always going to be a lot more average users than there are power users.
Completely subjective, but I have always loved the Firefox and Thunderbird logos. I've had them somewhere prominent on my desktops for so long now that I almost don't feel right without them. First app that I install on a new machine is Firefox. Maybe Google or Apple should try and snag Jon Hicks, I read he's working with Opera at the moment.