I'm sure we're going to see all sorts of behaviour here soon if we aren't already. The Reddit attitude I hope we avoid as much as possible is that pointlessly aggressive tone though. Not just in arguments but responses to posts from people who seem to have only just learnt the word fuck and use it to add an extra condescending slant to their weirdly celebrated rant about how someone misread a paper or something.
What I've hated about arguing in reddit was that they would attack things that are not relevant to the discussion at hand, like grammar, past post of the user that's not even remotely related to the discussion.
Also they get needlessly attached to phrases and words on people's replies taking away the context and attaching their own ideas to that. That kind of style of argument is very detrimental to civilized discourse and super exhausting to engage in.