During the wee hours of morning, when everyone has gone to sleep. My class schedule does not permit me pulling all-nighters for no reason any more, so I've been experiencing fewer and fewer of these episodes. But when I'm sitting on my desk, poring over the finer points of using monads or logging hours into Skyrim, I feel that if I could just push back the dawn I'd be able to accomplish anything. That said, I don't know if I should miss that feeling. Deciding to not be true to my night owl nature has bought me company in the mornings and so I think it has been worth it.
Society vs Solitude There's freedom in solitude (especially the wee hours kind of solitude) until it becomes oppression and we look for a different kind of freedom in the company of others (until it becomes oppression and we seek soitude.) Your comment made me think of Thoreau's words, I went to the woods because I wished to live deliberately, to front only the essential facts of life, and see if I could not learn what it had to teach, and not, when I came to die, discover that I had not lived.
But Thoreau lived a short way from town and went regularly to see his friends and have dinner with his mother.
I think it's as much in autonomy as it is in freedom. Preferably, I always want to choose whether I feel like interacting or not. A friend of mine lives in the apartment next door and he randomly comes by with a cup of coffee to hang out. Most of the times I don't mind but I often just want to be alone and I'm not gonna be the asshole to tell him to leave me alone.