My own. It's where I spend most of my time and also sleep half the night, because for some reason I can't fall asleep in the bedroom until I've first had a nap on the sofa.

The sofa in question is big and takes about third of the room. Around (and on) it are all my hobby things I need to distract me from the agony that is my existence. The room's also got windows on all sides but one, so even if I can't go outside a lot of the time, I can still admire the nature around us from this terrarium of mine.