One thing I've noticed about good boards is that they have that spede/spurdo balance between autistic serious discussions and shitposting. A lot of forums get overly serious and pseudo-intellectual which is annoying and boring. But sometimes on the other side of things like ylilauta or wherever those guys are lately, it's just nonsense 24/7 which also gets boring. But the ways in which the two sides interact when you have them on the same site is always fun.