I have several observations:
1. If you identify "fun" as missing factor, then inject fun into your forum as a differentiator! It's always great to bring something refreshing and different to your own forum.
2. Forums, and the web, have grown up. Several of these forums, and forum admins, were started over a decade ago when we were much younger. Many forum admins were teenagers, college, or young adults - ten years later, most of us have settled down into "adult" years.
3. The conversations hosted in independent forums have dramatically changed. There are still humorous and fun conversations, but lifestyle conversations of pop culture, entertainment, and daily life have shifted dramatically to places like Reddit, Discord, Amino Apps, etc. Those platforms have vacuumed up the masses and the social conversations.
With all of that said, I think this is a great reminder that we can have quality and thoughtful conversations while also keeping things light hearted for our members, and I love seeing creative activities in other forums!