Yeah so far Lemmy has been pretty chill, I havent even felt the urge to call someone a dumb fuck yet and I've seen some dumb shit already.
Something about the way everyone else talks makes it a far more friendly atmosphere. Most people here are open and encouraging, on Reddit people were trying to defend their overflowing karma pile with a spoon, extreme violence of action was common because there was more karma to be gained than being civil (more people checkout a big fight than 2 people making up over a disagreement).
On lemmy, votes don't really matter beyond the discussion at hand, and have yet to see a comment/thread actually go negative, seems like not keeping score makes everyone friendlier.