I generally don't recognize usernames and don't look at them too much

There's the guy who uses thorns (who I have tagged as Nigel þornberry)

There's maybe a half-dozen frequent posters who I'm genuinely not sure if they're masterful trolls, some kind of AI training bots, or just really need to go touch grass (preferably on their way to a therapist's office.)

There's one dude whose username just happened to stick out to me after having a random conversation or two with him and seeing him being a generally pretty decent dude around Lemmy, I tagged him "this guy seems cool" at some point, and at some point it occurred to me that he might appreciate knowing that, so I shot him a message, and sure enough he did. I now consider him to be a pretty good friend, which is a new experience for me, I've never really been one to have online friends, I (somehow) do pretty well at making friends in meatspace and have never really felt a need to seek out an online friendship.

There's a handful of people who have said some incredibly dumb shit that I've tagged (for example one dude who I tagged "Tankie, down vote and ignore" although the last few times I've seen him pop up it seems like he may have mellowed out a bit, so good for him)