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Fun if you're not attached to your wallet.
Gaia is a forum-based avatar website where users can dress up their avatars and socialize with other people. There's also a variety of virtual worlds and mini-games to play on and hang out. There's a storyline associated with Gaia and the shopkeeper characters of the stores are well-thought out and have their own, unique personalities.Don't let the content of the site fool you, though - you'll soon find that the company treats its users more like customers than it does members.
Pros: Tons of creative options. There are literally tens of thousands of items you can put on your avatar.
The MMO, zOMG!, is amazing. It's free and browser-based, so there's no download
There are tons of very active forums, so if you get bored with one you can go onto another
There's really something for everyone, whether it's art, roleplay, sports, or just general discussion
Cons: Site updates, events, and gold-shop updates are delayed repeatedly in favor of cash shop (real money) updates
Poor customer service; hundreds of users purchased an eight dollar evolving item that hasn't finished evolving for close to two years now. Other evolving items have evolved in 8 months or less
Quality of art is going down with the artists increasingly using short-cuts to create lower-quality items but more of them