(For those not in the know: A virtual Easter egg is a hidden message or feature in an object such as a movie, book, CD, DVD, computer program, or video game. The term draws a parallel with the custom of the Easter egg hunt observed in many western nations. (from Wikipedia))
So far I've found that the Character Selection screen has somewhat differing automated gesture animations for the characters. Such as when a female character is not holding a tool or weapon you get a set of animations that aren't in the game itself: Being flirtatious, teasingly accentuating her chest, stomping the ground then kicking it in frustration.
And of course there is the Matis female underwear. Normally when you take off your armor as a Matis female, the underwear is mostly white with slight blue/purple accents (veins/edging). But once you log out wearing no armor, the next time you log in they will be a completely different color! (They're all leaves, so the new one is somewhat dark orange with green veins, and purple edging).
These are the best I've found in all my time in the game. Anyone found better of any kind?

Share your memories!