I got my GGE badge. Whoopee.
I can't figure out how to change my quote, so it looks as though my legacy to the world will be the wisdom - "This space intentionally left blank".
That's actually better than anything I could have come up with, and I am in consultation with my funeral directors to have that inscribed upon my headstone.
[EDIT - just changed my motto on GGE and it doesn't seem to have updated my badge. Maybe it takes a while to update].
Edit: On GGE, go into My Account, Edit My Profile, then click Edit Profile and Image on the right-hand column (under the "You are currently in edit mode." box).