In a hallway, wallpaper is often viewed up close and in motion. The right choice takes into account this viewing distance, the doors, and the variations in light throughout the passage.
Choosing the focal wall
A long continuous wall and a small end wall do not produce the same effect. On the former, the design accompanies the movement. On the latter, it creates a point of arrival. Photograph both possibilities before deciding.
Examine the rhythm of the design
Very closely spaced elements can make the cutouts around the doors more visually prominent. A composition with open areas sometimes allows for a better distribution of interruptions. Do not choose solely based on the idea that a line will necessarily enlarge the space: look at the whole at full scale.
Plan the design repeats
Note the position of the door frames and switches. Test the framing to avoid placing a central detail behind a door. Keep a common color with the rooms served; the hallway will remain a link between them rather than a completely isolated atmosphere.