My usual one has been around for a while, though I updated the pic I think about two years ago, and need to do so again (I wear glasses now, and like to keep current), but the 238U theme is one I've used for years now.
The current one (the dove) is temporary since I tried to right what went wrong after I pushed the red button (Don't do it. It turns your and everyone else's avatars into Justin Bieber for twenty-four hours).
I'll switch mine back once I find a copy of it again.
238U.