Now I'm sitting in a cube farm, sharing a cube, and listening to administrative assistants chatter about their children and their health issues and what they had for lunch all day long. I started coming in hours late and leaving hours late just so I have a few hours of peace at the end of the day to get some focused work done. And that's on an 'easier to ask forgiveness than permission' basis.
I'd kill for a setup like the top comment by shostack, but just getting back to a cave would be lovely.