Sir,
Personaly I don't forget strangers if:
1. They are extremely handsome/beautifull.
2. They are extremely ugly.
3. Very neat and smelling good.
4. Very shappy and have a BO.
5. Very good mannered.
6. Very bad mannered.
7. Very friendly/ chats/ smiles/Respectful/ etc
8. Very unfriendly and rude..
etc etc
I am sure you have some of the above traits and I have the impression that you have the good ones....I can't not guess how Allaah made your features (look).. but I can guess how you interact with people
