1. Natural scenery: If you like nature, you can choose some beautiful natural scenery as your avatar, such as beaches, mountains and starry sky.
2. Animals: If you like animals, you can choose some cute animal photos as avatars, such as cats, dogs and birds.
3. Art: If you like art, you can choose some abstract or artistic pictures as avatars, such as painting, photography and sculpture.
4. Brand: If you have a favorite brand or company, you can choose their logo or product photos as your avatar.
5. Culture: If you like a certain culture or festival, you can choose some related pictures or photos as avatars, such as Christmas, Halloween, Japanese culture and so on.
I hope these suggestions can help you, but what kind of avatar you choose in the end depends on your personal preference and style.