My mom and I live in a cozy two-bedroom condo. She has the small bedroom, I have the larger one. She's getting married soon, at which point she's moving out and letting me stay in the condo (she'll pay the rent!).
So, I'll have an extra room. I'm trying to think of fun things to do with it, other than turning it into a den (I'm bringing my desk and entertainment center down into the living room).