After watching Office Space for the first time a few weeks ago, I was struck by the scene where Peter is talking about his average working day, and it got me to wondering about how much actual work I do at my job. I'm pretty sure that even on a good day, I put in less than 2 hours of actual graft. The rest is just mindless internetting, chatting with my colleagues, and wishing I was elsewhere.
So I'm curious how much work other people actually do in a day, and how you pass the time when you're not doing anything at all?

I'm focusing mainly on an office environment, but other spaces such as a laboratory, shop, factory, operating room, brothel, etc are fair game.

What layout do you prefer (open floor plan, cubicles, individual offices, group offices, etc)?

What kind of lighting do you prefer (natural sunlight, artificial lighting, dim lighting, no lighting, etc)? Does this relate to whether you choose a dark or light theme in software and websites?

What kind of desk do you prefer (sitting, standing, escape pod, etc)?

What kind of chair do you prefer?

Do you use headphones, earbuds, or nothing?

Do you eat at your desk, go out, or eat in a common area?