To throw some more anecdotes in with the rest of the comments, I love open offices. I've had my own office and found it lonely and boring. I never got less work done than at that job. Everything took longer because I had to stand up and walk to talk to my team. Instant messaging sort of worked, but if they didn't respond immediately, you didn't know if it was because they missed the message or they weren't actually i…
I think my best working experience was when I worked at a startup where there was a big "bullpen," but it was mostly for customer service; all other teams had massive conference rooms where you would have 3-5 people _max_ in that room, with the potential to shut the door if that team wanted privacy or more silence than other teams.