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.
Craftyindividual, pugjesus, adjjj, nanoUFO, all the frequent content posters in the magazines I am interested in. Sometimes I recognize people by name who post less frequently or just by avatar in the sidebar when logging in.