Why would your head always be turned to one side? Have one monitor in the middle (the main one) and secondary either left or right. Having split screen right in the middle of my field of view is ridiculously unpleasant

This is why ultrawides are very comfortable, you can focus on the center region where 2x monitors likely have their edges meeting.

I have three monitors. The left and right are turned vertically. They're all 30". So the main screen is in the center and I keep slack/email/web browser with docs/info on the left and usually Twitch DJs or Spotify on the right. So usually I'm looking forward but I look left briefly throughout the day.

I do this too, and just put less-important stuff on the second monitor. Work chat, music, logs, whatever.

I have a rotating chair (normal desk chair) and I rotate the whole chair to look at the other screen If I need to look at it for more than one second.