I enjoy them. It strikes me as extremely odd that the main complaint against open floor plans is that they kill productivity. This is such a complaint that there's people up and down this post moaning in agony as if it were literal torture that they're unable to be as productive as possible. Personally, I don't think that a company is entitled to me working at 100% productivity constantly, because I value my sanity too much. Yet, here are people begging, pleading for their employer to make them be able to produce more for their corporate overlord.
M'eh. I work at the efficiency that is comfortable for me. Occasionally I chat with my coworkers about stupid shit to keep my mind loose and give it a break. If I absolutely need to be in the zone for a couple hours, I put on headphones, find a private room, or work from home. I'm completely ok with open floor plans.
About the only things that would draw me to a private office job is, first, the prestige of having your own office, and second, the sense of ownership of space. I imagine it to be very comforting to go into work and have one little 8'x10' space which is "yours". If we're being honest, I think these two things are actually what the anti-open office people want. They just use productivity as a way of masking it and making it appear better to their employers.