One fast monitor, a tower on the desk, light on the wall

The player who runs one PC, one monitor and mostly competitive or action titles. A 27-inch 1440p panel at 240 Hz is the sweet spot for a mid-to-high-end GPU: sharp enough for desktop work, light enough to drive at high frame rates, and small enough that the whole screen sits in the eye's comfortable field of view. The tower lives on the desk because the case is part of the look, and the lighting is tuned for a room that is kept dark while playing.

Discipline. One monitor on an arm clears the stand off the pad, so a full-desk cloth mat can run uninterrupted under keyboard and mouse. A 75% keyboard keeps the arrow keys and function row but gives the mouse hand roughly 10 cm more swing room than a full-size board. Light bars behind the display put colour on the wall instead of in the eyes, which is the difference between bias lighting that reduces strain and RGB that adds to it.

Anyone who plays with the lights on should swap the IPS panel for an OLED or mini-LED to get back the contrast lost to glow. A racing-style gaming chair looks right in photos but a mesh task chair with a long warranty holds up better over years of sitting. And if the desk is narrower than 140 cm, step the pad down to an XXL and consider wall-mounting the arm so the surface stays clear.