When picking or editing a gaming or anime PFP, focus on a strong silhouette and...

https://purepfp.com/why-bold-game-characters-remain-recognisable-in-tiny-profile-icons/

When picking or editing a gaming or anime PFP, focus on a strong silhouette and high contrast to make it pop even small and circular. Crop tightly around the face, skip busy backgrounds, and avoid text