Having tried all three, its a stark difference in how much more social Lemmy is comparatively. Its not even close. Almost all posts I've encountered on lemmy have interaction; whereas, more often than not, posts on the other two platforms have no interaction. Wonder what the driving factor is behind this difference?
One thing I've found on lemmy that was almost impossible to see on reddit...
People apologizing for being incorrect. Also, people having actual conversations, without the immediate influx of "No, YOURE WORNG!" people.
I think it helps that Lemmy is so small, we know we're going to encounter each other again.
I hope it remains so! Its a big reason why I'm really keen on instance defederating, and such. Make the "island chains" just a touch disconnected, to keep monkey sphere's small.