GOOMB SMP is a vanilla survival server on amplified terrain and it feels really packed and fun. The world was reset a few weeks ago and there is a 6k by 6k border so everyone ends up building pretty close.
Because of that people make bases near each other or together and it feels like a real community. Players already started making shops and planning different builds so it looks like this world is going to grow a lot when the border gets bigger.
The discord is super busy. People post screenshots of the crazy amplified landscapes and talk about trades and deals. Voice chats are usually full of players hanging out and talking about their plans for the world.
The rules are pretty strict but simple. No griefing no stealing and no unconsented PvP. No racism or hate speech and no NSFW stuff. Be respectful keep things drama free and be mature and use common sense.
To get on the server you first apply to join the discord. The mods read your application and if they accept you then you can ask to get whitelisted. The server feels like it really cares about community and keeping the world safe for everyone.
This is season 2 and there are even some screenshots from the last season so you can tell people stick around and build a lot.
