The most objectionable part for me is noise level, followed by the fact that my seat faces the big windows, which are frequently too bright. They are also often too warm for my comfort, though too cold for others. I don't want to listen to music or have hot ears from headphones. I started working life in open plan but quieter than nowadays but best was working in a 4 person office. I'm currently happier working in my study at home.
