Eph, GaiaOnline is actually more of a 'kid's site' because for it's completely 2-D avatars, no 'mature' items, and lastly anything 'mature' is against their ToS (Blood, gore, sensuality, ect.).
I've been a user for ther for about 2 years before being introduced to IMVU. I still use it when I need to contact friends back home. My user is Vosur (Yeah, that seems to be a pattern)