Although Lemmy's userbase is quite large,it still is small enough that I do often see the same people in comment sections. It feels though, that I should recognise more names, because I can only remember around 5 individual ones.
I recognize a lot of people, both good and bad. When someone stands out I set a note for them in Lemmy, so I can see them more easily. So far in this thread I see [email protected], [email protected], and [email protected] - all fun and awesome from my experience.