I think it be really cool to have a friend's list on here. What do you guys think? Yay or nay?

Nay. We are not social platform, go make furrynetwork account or use discord located in Chat on top panel.

This isn't even built in the mandatory feature request platform

I'd rather not. I wouldn't expect a lot of friend requests, but it's kind of awkward to have to tell people no when you get them. It's not that I'm antisocial; that's just not what I'm here for.

All reasonable responses, just wanted to gauge what fellow e621 users thought of it❤

I mean you could just create a list of links to pages of users you consider friends on your profile in your "user info" if you want. You can go here: https://e621.net/help/show/dtext for help with formatting lists and whatnot.