Pair programming all day, every day I thought I could handle. Turns out, I'm in no state to interface with any other human being, including my SO, at the end of a day of that. I think it's a good fit for a select group of folks who are both extroverted and technical. I also prefer having a tiny corner of my own space at work. It's comforting. At the office where I worked, everyone shared desks (you sit wherever your partner for that project is sitting at the moment) and nobody had their own space. It may be different at other Pivotal offices, but I didn't enjoy the short time I was there.