Square account tiles
Use the portrait in a member grid, account chooser or project directory that displays equal-sized tiles. A simple background makes a collection easier to scan. Keep the same color family across related profiles and vary the expression to distinguish individual characters.
Circle-cropped profile images
A square source file can also serve a destination that crops avatars into circles. Check that eyes, glasses and mouth stay visible in the round preview. Hair at the outer corners may be clipped, so choose a compact outline if those details are important.
Profile cards and creative layouts
Place the square PFP beside a username, short bio or game statistics panel. A transparent background lets you supply your own card color; a solid background makes the avatar self-contained. Save a version of each if you use the portrait in several layouts.