I am literally unable to remember people's faces. If you talk to me, go for a walk, and come back ten minutes later, I won't recognize you.

Once, the guy who sat next to me at university for two years, and with whom I spent countless time together, took the same bus as me. I hopped on the bus, saw him, and my brain told me "Uh, that's kind of a familiar face, I guess". I smiled to him (because he looked familiar), then I passed him and and went to sit some rows behind.

He's made fun of me ever since.

The worst thing is, I work at the front desk of a hotel. I always struggle to remember who's who. Sometimes I recognize their shirt, their hair, their voice, or I see a family with two kids and remember "oh yeah, they're from room 210". But most of the time, I must ask them to remind me which room they are, even if they checked-in just ten minutes before.