[amerkhalid]

I prefer one screen. For work, I use 15-inch MBP without external display. Sometimes, I use a stand to raise it a bit and use wireless keyboard.

Personal laptop is connected to 21 inch monitor but I keep it closed most of the time, so only one screen.

I find my productivity is so much higher on one screen vs two.

However, I feel like vertical configuration, in which laptop is in the front and monitor is raised and slightly behind laptop works for me, as long as I am not moving my neck up and down.