I loved the old forums, and couldn't quite see the point of Facebook when it came out. I thought it was just for self-obsessed 'models' and wannabe 'celebs' when I first heard about it! I joined it eventually of course, as all my friends did and I wanted to see what it was all about. Over the years I've had a love/hate thing with FB and only check in a couple of times a week now.
I liked Reddit, it reminded me of the old forums. I like Lemmy more though. It's still got that feeling I remember back in the old forum days before everyone and his dog got online on their phones and things seemed to go downhill.