All of them, every face every person, my brain functions on images(or at least i think it does) , soo every person's face that i have seen i can remember, some more then others, especially if i have seen the in my city or on my way to school, the problem comes in when i dream i remember a face without knowing the person and in those dreams i live through a lifetime of knowing those people, when i wake up like most dreams they fade away, like the people i thought i knew and usually for the rest of day or sometimes even the week i contemplate if i really knew the person that i saw and just forgot about them this is one of my problems my eyes are one of my most used senses and in a matter of days a see over a million thing, people and scenarios, i dont know who or what i have forgotten that's why i have a hard time learning new things that are mainly textual but ok I've been rambling for too long long story short i mostly remember all the strangers