>>1121640YTMND introduced me to /b/ in 2009.
This format enables a level playing field of ideas.
Other sites hide posts based on voting and algorithms. As a result, popular ideas get more exposure, so they become even more popular.
Most sites ban rudeness, so people don't even get stern corrections when they are being retarded or sanctimonious.
Because there are no persistent identities, I don't have to worry about reputation. I can help a nazi or an anarchist, a coomer or a moralfag, it doesn't matter.
I have autism, so I never feel like I belong to any group. I can roleplay as one type of person in one thread and then forget about it. On websites with usernames, you get to know each other, and then you can't switch personalities without pissing everyone off.