This entry used to be a dropbox for userhead ideas, but I have locked it since it only duplicates the purpose of the official community.
Ideas from past suggestions:
LJ pencil (bonus: retro favicon!) http://suggestions.livejournal.com/1076387.html
dark pigtails http://community.livejournal.com/suggestions/1045502.html
different colors for paid/perm http://community.livejournal.com/suggestions/1017986.html