I received really heartfelt (to me) and sincere life advice on 4chan. I think the fact that it's anonymous without a real karma/voting system means there's a lot less ego-driven, self-centered posting. People don't try to attack as much or have bitter back-and-forths as much as twitter, reddit. They might argue for a bit and then just say f it and move on. But there's no motivation for ragebait, karma farming like there is on twitter.