Names, faces, where we met, what we discussed etc. I am blessed with a strong memory probably related to my childhood of being a runner, cross country and otherwise.
As I age I try and maintain my brain power through nootropics. Much of it is sketchy science so not sure if it works or not but I try. IMO the best approach to keep a strong memory is exercise. I feel the difference since I don't work out anymore.
Sometimes it may take a moment as my mind first compiles the face and then I have to locate their name and location, but it is eventually assigned by my brain. For the Creepy Ones in my city it makes their job far more difficult.
For instance, just last month I saw a guy at the Dollar Store, it was in passing. Immediately my mind recognized him, I wasn't sure from where. I arrived at home and told my wife "I've seen this guy before" and it was bugging me. Within a few minutes I remembered, "ah yes, I worked with that guy a few years ago at a temp job I did". I remembered his name, how his voice sounded, what we talked about.
My best was probably a woman who I saw on TV at CBC. I had met her once during my MBA in an after class party type networking event. At the time I drank alcohol so I had a few in me as well which makes it that more impressive. We spoke for about two minutes, if that.
I saw her doing a news cast on TV, different hairstyle, same face. I told my wife "that's _______, I met her at an MBA event 15 years prior." For some reason I instantly recalled her name based on her face. A few seconds later her name is provided underneath (I didn't know her last name, now I do). She worked at CBC but has since left.
Memory is a tricky asset it can sometimes be a liability even a burden. It's in our best interests to maintain it though, I've seen shows of those with altzheimers, such an outcome scares me.