For my group, because it opened to all the mythologies and not just Greek (and I did that because there wasn't really one out there), I am having a icon contest. This is my example.
I usually have 2 weeks for a contest, but this time, to allow people more time in case they are busy, this contest will last a month.
I'll request new sets
The title of the group must be there
Art, fashion, dolls... whatever. I'd prefer an art icon, but that's just me. And I say that because I'm letting the members vote on the winner.
And go nuts. You want to represent one type of mythology, go ahead. Want to depict a common theme in all the mythologies, knock yourself out.