SecondLife is cool, and I've managed to acquire quite a number of cool things, including a two seater combat jet, and today! a puddle jumper.
It's not a perfect place, but it's definately fun. And not nearly as social as one might think. You don't have to talk to anyone, interact with anyone... just do your private little thing.
Here's some snapshots of my current house. Yes, you can change houses, change appearance, change your sex. I even have a snow leopard outfit I will get pics up of soon.
My house view one
My house view 2
my house view 3
My House view 4